I’m wanting to buy a plane but want to do my homework before I buy I one. First step was find a hanger and I have that taken care of and insurance quotes. I have it narrowed down to a cherokee 180/archer. What AD’s/maintenance items should I look for with a cherokee or archer. How bad is the backseat in an earlier cherokee? Could an adult fit in the backseat? Let’s say the plane is states away how would you get a pre buy inspection not knowing any mechanics in the area? How do you register an aircraft after buying it. How does sales tax work with aircraft? Any way of reducing sales tax? Any help of would be appreciated. Like I said this is my first time buying a plane and want to have my ducks in a row before I start seriously working.
I have a 1972 PA28R, so comparable to the models you're looking at -- just with retractable and constant speed prop.
You can comfortably fly 3 adults in my plane with 1 in backseat (and it has the 4" stretched fuselage which apparently makes a big difference for rear seats).
4 adults would be a bit of a stretch just in terms of making the weight work, unless they're all FAA regulation sized adults weighing like 150lbs. Once you throw in baggage it's going to be bad with 4 adults.
The climb during summer will suck if it's loaded down heavy, that's my biggest complaint. If you're flying somewhere with high DA you'll also want to consider performance, especially if you're going to be loading it routinely with 2+ adults (you asked specifically about adults in the back seat so I'm guessing you plan to fly with >1 adult pax often).
Piper ADs: wing spar is the biggest. Landing gear side brace stud (not relevant for your models I don't think). I had an AD for ignition that I had terminated by replacing it. Other than that no really costly or annoying ADs I can remember.
re: purchase process.
The first step you're going to want to do is find a local A&P who will take care of your plane. Tell him your target models and he can inform you about any critical items to consider (like expensive ADs or frequent issues for that series).
Second, you're going to want to find a plane. Sounds like you already know which models you want so that should help you narrow it down.
Once you've found a plane you'll get a prebuy. Start by getting the logs for the plane. Then, if the aircraft is far away you have a number of options:
1) Ask your local A&P who will care for your aircraft if they're willing to travel with you to see it (after they check the logs, of course)
2) Ask your local A&P to review the logs for the aircraft and coordinate a pointed, detailed list of items for a local A&P to look at and talk through. You'll be paying 2 A&Ps for their work, but still probably cheaper than flying your A&P out for 1-2 days of prebuy.
3) Disregard using a local A&P all together during prebuy, find a shop in the aircraft's area that you're comfortable with and have them do the prebuy. Risky IMHO.
4) Don't get a prebuy b/c its inconvenient and regret it later
Personally now that I have a local A&P who I know and trust, I'd likely do #2. When I was a new pilot and had no reason to trust one A&P over another I did #2, and then did #3 (and regretted it).
When you're buying, I recommend using some place like AerospaceReports as the escrow service. First off, it's a good way to keep your money safe rather than just sending a deposit to a rando. The side benefit is that they quarterbacked all of the paperwork for my purchase, the loan docs, and for a really small fee that I split 50/50 with the seller. They gave us each the necessary paperwork to fill out at every step and then they either filed everything with the FAA or gave us clear instructions about what we needed to submit and to who. Everything went off without a hitch.
For taxes, you'll want to google something like "aircraft use tax" or sales tax for your state. IIRC Illinois was 6.25%. So... purchasePrice*0.0625 = you write a check for that to state department of transportation. No idea if there are magical tax dodges available.