Some I sell regular, some I carry, some I exchange. 

I was told by my broker that there are supply problems resulting from the pandemic and the sudden drastic increase in constuction materials demand in Florida. 

John in our laundry it is right about 175.00 for one; both machines has been 350.00 regularly. 

So do regular rent increases each year to account for that.

I would search for a bank that would finance this as a single family and get a regular 30 year at around 3%. 

Yes, but you need to narrow it down a lot to have a coherent answer.You will have to look at (I'd recommend in this order) the city codes (if it's inside a city, many cities above 50-100k population aren't friendly to development of these), the county codes (most counties are friendly to these, but you will probably have significant issues in major counties like Bexar, Travis, Dallas, Denton, Tarrant, Harris, etc), then you will have to comply with the state-level (TCEQ and others) on the water supply and waste water treatment systems.To put it in perspective again, in say Dallas or Austin, you will likely have prohibitions or very significant hurdles on developing RV or tiny home properties even on unincorporated, "unrestricted," AG-zoned properties at both the city/municipal level and county level.

This helps make sure bills (you) get paid regularly. 

Again, the easiest (free) thing that I can think of is just to set up an account an an easy to reach bank (even if not my regular bank) and have the tenants do cash deposits that way.

According to Bank Rate, interest rates have hit short-term highs, tightening cash flows and making qualifications more difficult.Source: Bank RateSingle-family home (SFH) marketBut the SFH market is showing no sign of slowing amidst record demand and low supply.

The rate of inflation is the highest level in nearly 13 years, signaling greater stress on our economy as businesses grapple with supply shortages (that are at least temporarily raising the cost of many goods and services).