Also, without even looking at the plans a 7 unit building will likely have flawed floor plans and/ or an inefficient layout unless its an irregular site.

The data backs this whether it is derived from case Shiller top performing residential markets for this century or it is based on the data of the top appreciation markets in neighborhoodscout.  

The asset class will be dependant on how much capital you have availabile and how much renovations you plan to perform. 2) Is there an income gap between going after 2 units as opposed to 4?

I do have several S8 rentals, while they are generally performing well, there is more paperwork involved in the leasing and the strict inspections can be quite a pain. 

After six months of STR performance, transition to a DSCR loan or portfolio lender refi for better terms.2. 

My husband is on site all day every day as the GC and that helps.

Toxic waste site on Super Fund List  6.

The two WORST performers are down 85% each!  

Quit expecting the tenant to 'perform' for you. 

@Raul Velazquez The 3 things I would recommend besides reading books/audio/sites are:1.