I tried to contact Edward- the sales guy listed on their website and he just told me because they gave me a discount, there is no credit for the the $149 fee that I paid to talk to a lawyer.

My mortgage payments are currently $2,841.40/month and my property management fees are 4% (I'm striking a deal with a property manager I trust so I'm super thankful for them giving me such a low rate).

It'll tell you a $500k conventional mortgage was recorded in July 2021, you can infer from the ownership record that it was a refi (same owner before/after), and you can ballpark that rates were around 3%, assume it's a 30YF, so the balance "should" be X, but you have no way to know if they made a large lump sum payment, pay extra each month, etc. 

We have a interest rate around 3% on the SFH, purchased in 2021, so doing any refinancing with that doesn't seem to make sense.

According to HUD Fair Market Rental Rates for 2024, the market rent for each unit in the 34608 zip code is $1,700 per month.While the units are in good condition, consider updating the kitchen, bathrooms, and fixtures and adding a fresh coat of paint for a fix-and-flip strategy.

What loan type (DSCR or conv) should I be looking at and what rates?.

And vacancy rates may also increase because of the amount of bureaucracy you have to go through to place a new tenant.So again, a lot of variables.

In the 80s interest rates used to be double of what they are today and people still succeeded.  

Also, he could have done well in a different rate environment.I am not sure why you feel the need to comment on comments, but I would find better things to do with your time.

This will be done as a "rate/term" transaction, so better rates than a cashout transaction.