What other kinds of loans or financing strategies are available that don't involve using too much of your own cash?

I will secure the loan for everything.

I bought a 3/2.00 home in Tampa, FL in April 2022 for $245k at a 4.75% interest rate, I still owe $210K on the loan, my RE agent thinks it could sell for $280k ($70k in equity).

typically no special license is needed when doing it for hard money loans that I am aware of. there may be states like california and nevada that are tricky where lenders need a license of some sort but for most part brokers i have seen are not licensed. 14 or 15 states require state license and NMLS registration.

We approached the existing lender for a loan assumption.

DSCR loan How did you add value to the deal?

One solution could be a Debt Service Coverage Ratio (DSCR) loan.

When I asked for a loan, they asked if my business received money in Euros. 

@Robert EllisAre you leveraging construction-to-permanent loans or private funding?

DSCR recently came popular in the loan brokerage and private credit space with the rise of STRs and MTRs.Your local bank lenders will have the best rates typically.