You can extend your house or increase the main house square footage where you add a room with an door for entrance/exit.

The house is a side by side duplex. both units are identical and both have separate entrances, separate meters, why wouldn't this be a legal 2 unit?

Makes for a great entrance into the REI market and avoid using FHA MIP & UFMIP so no 1.75% finance fee built into the loan.

Not needed as entrance/exit2) Not remove or ruin existing doorway.

Two driveways with private side entrance to the lower level.

Essentially, you have to have a separate entrance.

If you are afraid to exercise your rights or fear your tenants take a witness with you to protect your rights.Tenants that are given legal notice can not legally bar entrance by a landlord and do not need to be present for the landlord to enter.

Its $250 entrance fee and first three months free for Lot Rent. 

A separate entrance is probably best, but not necessary.

This strategy is great, but it fluctuates depending on the time of year, you probably won't live for free because it is more challenging since you are only Airbnbing a small space or basement unit.3) MTR - this is a good in between style of creative strategies since you can furnish a place nicely that would rent out on Airbnb but you want a long-term high quality tenant like a travel nurse or corporate rental that stay for 2-3 months vs. under 30 days for most Airbnbs.Combining strategies is the best way to go, ideally, you would find a house with a separate entrance or walkout basement, live upstairs in the one of the bedrooms, rent out the other upstairs rooms and STR/MTR/LTR the bottom unit.