@jsstevens - has the best suggestion. Seems like you are from a populated enough location that clubs should be a good option.
So if you don't mind risk, this approach would probably be about half the cost of a standard training program. It also means needing a chunk of money that you can tie up for 2-3 months:
Get your medical first
Buy a online ground school course, complete it and take the written.
Find a local and available CFI (not at a FBO). Come up with the hourly cash rate agreement (ideally $30..40/hr or so).
Get to know a good mechanic (A&P, IA)
Find a Cessna 150 in "just good enough shape". Have the mechanic check it. Then buy it. Probably around $12K..$15K
Park it on the ramp (not preferred but is often free in many small airports).
Fly at least 4 times per week out of your small un-towered airport which will minimize taxi and wait times.
You will probably solo in under 15hrs and finish in about 55hrs but lets use 60hrs.
Sell the plane for a $1000 loss.
You will burn about 360gal of fuel. At smaller airports this might be $4.50/gal ==> $1650.
The plane will need 1 oil change ==> $50
There is usually some ground instruction before and after a flight. Of the 60hrs above lets say 15 are solo. So that means 45hrs of actual flight instruction and probably another 20hrs or ground before/after so a total of 65hrs of CF time at $40/hr ==>$2600.
The medical, online ground school, written exam, flight exam, cheap headset, stuff, etc will probably be around $1000.
So you are now at $5300 of money you will not get back.
Then sell the plane.
So PPL training in your own plane, which ensures you get all the hours you want when you want, would cost you about $6500. But you would need $20K in advance to pull it all off.
I don't really advice this approach. You would need a good flying mentor to assist with ownership stuff. You would need to be someone who takes things very seriously and listens. If you are in the klutzy forgetful crowd this is not for you. You should be mechanically inclined (eg oil change). And good insurance only covers so much. So you could be out the entire cost of the plane for many reasons. However there are many people that buy a 150/172/Archer and go from zero to PPL in it. They save some money. But the fuel and CFI time will cost you no matter what.