However, these situations can be complicated, and it's to your benefit to have a realtor on your side (if you don't already) to help you negotiate and stay within the law.Your post was pretty general, which I appreciate, but I don't know if I handled all of the concerns someone in your shoes would have.

Just google skiptrace and plenty of sites out there to research public info on people.

Found this site and ready to explore.

Maximize cashflow via STR (hoping to get 7-8% net)Second question, with these goals which would be the most attractive area for such an investment: Miami Beach, Miami Downtown, Brickell, Midtown.Thinking of getting 2 condos (1 bd or 1bd + den) ~$750-1M eachPayment structured are usually 30-40% until project is completeThank you find undervalued land and entitle it and capture the delta of underpriced land. there's a lot of sites that are underentitled.

Our primary site for leads has always reliably been Furnished Finders. 

Are there if any sites specifically filtering seller finance deals? 

@Doug Spence check out https://symbium.com/ it's a good site that let's you see your lot's feasibility and connects you with ADU contractors.  

On the site I search on the new listings are first so it only takes me about 7 minutes to cruise through about 12 neighborhoods.

His story is long and complicated but the gist of it is:He bought the house somewhat distressed in 2019 (through our mutual realtor). 

We use Booking.com (in addition to Airbnb/VRBO and 12 other sites).