I sold my 70 fastback to pay for college in 1997 for about what it takes to buy a rough roller these days.
Take the two 69s you have and if you can do bodywork cheap, get them straight and decent (don't paint them) and throw the rollers on eBay and get some money out of them. Or throw them on as is and just get what you can for now.
Then take the $2500 you will waste on the T/A and add it to the roller money or use it to get the two rollers straight and good enough to get $4-$5K each (69-70 fastbacks bring cash in rough shape, check eBay! cuz I have considering getting a tub for my next project and my jaw dropped what I see a crappy roller go for) and turn your $2500 and two free cars into about $8-$10K or so, then buy a 65-66 fastback in okay running condition with rough body, do all the work and a decent paint job and turn for $3K-$5K profit on a regular basis (when the economy is better).
My neighbor a couple years ago had 4 or 5 65-66 Mustangs in front of his house on average every month - he was buying rough ones on eBay, doing rust repair, etc himself, rebuilt engines at times if necessary, so forth and put a decent (at best) paint job on and would sell it on eBay 2-3 months later so he was pretty much averaging 2 cars per month flipped. He tore down his 2 bedroom house and built a monster on the lot with the money within just a couple of years...
and don't listen to the sour pusses and stuck ups with their taste for fancy paint jobs smack you down, I was your age once and we all start somewhere

and I admire a seriously sweet paint job as much as the next guy. Keep in mind most on this forum pay others to build their cars so it is always a losing proposition for them... flipping cars can be done when you do the work and the paint jobs you are showing are more than adequate for that. But stick to the obvious cars - the early 'stangs are popular and new repop parts are aplenty.