First of all, a multi-year lease should be a hard "no" even if it was a perfect tenant.

I think the above are the type of items your engineer wants you to look at.  

Due to item 1, adding an ADU can require years to start achieving any return (once the accumulated cash flow recovers the initial negative position).4) Adding an ADU is a slow process.

We are solely working on assisted living:- Buying homes and leasing them at higher than market rates to these business operators- Purchasing existing businesses with the real estate- Developing / building newFor us, the business makes the real estate cash flow, we can create a massive impact, and the demand outpaces supply and will continue to be that way for the next couple decades.

Strategies include offering owner financing, allowing trade-ins, or providing lease options.

-A copy of the Property Management Agreement and Lease Agreement. 3.

And when you do a lease for MTR, you'll need to put that in the lease in case they stay through high season, spelling out exact prices for each calendar month, so there is no confusion and it is legally enforceable. 

Once before the lease signing and often at the lease signing.

Lease provisions in one place that are common and acceptable may not be allowed elsewhere.Overall its worked out for us but there's definitely some potential pitfalls.

You need to make sure that your property is easily financeable if you decide to sell it in the future and any future buyer can call out non-permitted items and actually report you to the building department or, at a minimum, ask for seller concessions.