The profit was used to buy a higher quality SFH in the same area.

The price you pay for being part of the Disney World spoon-feed of guests is that the barrier to entry for profitable STRs (ones that leverage close to or max LTV) is very, very high.  

My first property was paid off making me only $1000/month profit.

The property manager must make a profit, otherwise there is no incentive to provide the service.

Petersburg area, resulting in highly–profitable investments.If you need professional and courteous property management experts for your multifamily, single family, condominiums or town home, you've found the right company!

I've Had 1 rental that I sold for a good profit recently.

How much profit at the end do you expect to realize and what time frame do you project to receive it?

You profit share with them for the first 10 deals (at the higher levels) because they really are right there with you holding your hand, and as I mentioned, doing three way calls, etc. every step of the way.  

When starting out it’s a pretty good deal for someone lend you all the money and you give them 50% of the profits.

If your investment is still profitable with the increase, then press ahead.