Usually, it costs me $3000-4500 for title and escrow.

TIA I look at these things the most when looking for BRRRR cities - Rent-to-Price Ratio: Look for cities where the average rent is high compared to the average mortgage cost- Population and Job Growth: Focus on cities experiencing steady population and job growth, higher than national average- Availability of Distressed Properties: Look for cities with a supply of pre-foreclosures, short sales, and abandoned propertiesNormally bigger cities in those states should do well, houses are still somewhat affordable (comparatively) and if you do a big rehab it'll pay off

I'm going to guess your costs have gone up (insurance, taxes, utilities) and they should be passed on to the tenant.

I dollar cost average my investment purchases.

But, the point is you want to understand the rates/terms of the loan you are using to make sure that you are not paying a lot of additional costs or pre-payment required to get the cash out a few months early. it may very well be worth it but you want to compare apples to apples. 

Just keep all your financial records regarding the purchase, improvements, holding costs, etc.

There may be a valid reason that both of you can work around.If not, legal action is often the route that costs you more and gets you nothing. 

We made a decent bit each however in the western suburbs of Chicago it only cover either down payment or rehab costs, not both nor a turnkey house if looking at a rental which is what I would hope to do with it.

Definitely talk to a Florida based real estate lawyer if you are unsure what to do though, a quick phone call to one shouldn't cost you anything.

Then see how much time you spend every month hassling them for payment say 2 or 4 hours every month.If you logged all of that time 15mins or 1/2 hour every time you call etc. that adds up.You might think oh it doesn't cost me anything just my time, then your time isn't valuable and you have undervalued yourself.Don't let people do that to you!