I 100% agree with the intent aspect and that is an important premise, but the fact is in this particular situation intent for it to be personal use has been confirmed (by way of a public post).

Do you think it's common for a tenant to sue for an amount greater than insurance can cover, then take your property or even your personal assets? 

This deal proved to be the perfect balance of financial gain and personal enjoyment.

Required good credit, adequate reserves, full doc commercial loan with a personal guarantee.  

I would recommend anyone lending in this environment to fix and flippers or any type of investment to be careful and get a personal guaranty and make sure person has a long track record.

I have not done it personally but have some insight, maybe my reply may boost your post to someone with more experience in it. 

What RichDad does not tell you is that it takes a driven personality to build a portfolio and if you have that type of personality you will not enjoy a retired state.

The challenge was balancing the relationship between landlord/tenant and a personal/friendly relationship.

I don't have any brand preferences personally (I use Fantasy Spas at most of my units but I'm sure there are alot of reputable options), but just make sure wherever you place it is built to handle that type of weight.

i think this is a decision only you can make. im in a similar boat (house hacking my primary) and considering renting the whole thing out to get a solo home for myself. certainly a lot of appeal in that, given how much work goes into the house hack. but whether or not the numbers on cash flow align is up to you. personally i dont think $150 (seems like about 12%?)