I am currently looking for multi-family in my area in attempts to practice analyzing deals, and My real estate agent knows my goals and sends me some listings.

Have you started practicing some of these skills such as underwriting?

I can legally pass referral fees out like they are candy to any licensee (They never have to show a house or put up a sign, pay for MLS access or join a board, just be licensed by the state to practice RE).

I'd base that decision on the general rule that an unattached MH will depreciate over time, weakening your position later if your lease option buyer didn't exercise the option to purchase (ie you get back a trashed MH that's worth less than when you originally leased it).

I wonder how many investors are doing these math exercises.

But, I feel at same time some items can be discussed on a broader sense as best practice etc (like how you've set up/manage the LLCs). 

Typically I would coordinate with the existing tenant and have 1 or 2 open houses, however with social distancing and being respectful to hygiene practices that seems impossible. 

Is it common practice for the landlord to handle this?

My attorney (in NJ attorney is required for a RE transaction) also doesn't think it's a big deal and actually advised towards it (if they don't finish by closing we exercise the escrow).  

My income isn’t always as steady and predictable as a normal W-2, So starting out with a house Hackable property that also includes a basement where I can record/practice out of is an extremely ideal entry point for me to get into real estate investing, especially if it doesn’t require any major rehabs.