I have spoken with them a few times, they are unconcerned, and happy to have me just pay the interest every month until it converts.

Cash flow is definitely the biggest challenge; both in terms of finding properties to buy that cash flow with a loan on them and just company wide given interest rates and labor/material is up and, at least where I'm at in Jackson County, MO, taxes are way up too. 

Maybe an investor is flipping a lot of properties and you could offer to pick up and deliver materials to his crews, clean the work sites every night, bring his crew lunch, or whatever.Find a way to make yourself useful to them, and they will reciprocate.

I grew up in Bucks County and started my career in Real Estate in Doylestown.

At this point since it's after the fact while not totally correct; you may explore adding the missed asset/basis amount as a selling cost to just reduce your gain. 

If your clients/or yourself put the time into learning and figuring out a niche in the RE world that excites you, start looking for deals that make sense and always run the numbers.

@Ryan VienneauAre they able to set-up your credit cards as additional "accounts payable"?    

I have always had an interest in flipping houses because I get really excited to see run-down houses, walk through them, and come up with a design plan.

I can feel that you have embraced the move and change. if you want to meet some local investors there is a meet-up next Tuesday. it's posted in the classifieds.

STR is another concern, many towns have laws against it but most towns do not enforce these laws, just make sure you are aware of them becuase they can be enforced.