Here's a sample breakdown of what money belongs to each property:Property A: $2500, Property B: $5000, Property C: $5000 for a total of $12500.Easy enough.

Cap rates are going to vary highly dependent on:Asset class type (A, B, C, or D)LocationRecent updates vs deferred maintenanceThe expense ratio is also difficult to answer with a specific range as the property condition and local vacancy rates will better determine expected returns.  

We are considering putting a container home on his land to Air B&B.

If on the other hand, you don't like your current job and want to use real estate as a way to decrease your regular job, then a) try finding another job you like, b) buy some properties to either flip or rent. 

Suppose you have property A with 8%Cap and 25%Equity and property B with 10%Cap and 100%Equity (owned outright).

@Dave Foster Correct, the 3 rental years after moving out (from your example) would not be considered a period of nonqualified use, as per Section 121(b)(5)(C)(ii)(I).

If this is the only thing she's ever complained about (or all her other complaints were valid) I'd buy a new broiler pan and would show up with an oven thermometer to show her that the oven works well (and if the thermometer shows it's not heating properly I'd have it fixed or buy a nice used one if it was a C-Class property and if it was a A or B-Class property I'd probably buy a new one). 

IIf you want to be very active, then $50K can Cash Flow pretty well finding a Class C/B property, renovating it, and renting it out using the BRRRR method in certain markets in the Midwest or Southeast.

@Basit Siddiqi I will change the verbiage..do you know how to get business lines of credit by setting up D&B ratings or businesses?

@Nick B.