I work with some top business brokers to establish real estate values and they establish business value.

I have a lot to consider, but I just want to ensure I set it up the right way from the beginning.

Unless you are renting to a well established nationally known company (Ford, IBM, etc), I would get the guarantee.

While paper equities had a great run in '23, I find the indexes very frothy and reduced out of those as well in my retirement accounts over the last couple weeks. 4 SS facilities sounds like a lot to sell. 

Similar for a shower with a proprietary enclosure and a Schluter system and fixtures which bear an enormous discount to plumbers and installers.Paying the GC on day one for these things does not reduce the risk to the GC unless it is established in the contract that materials are paid upon delivery to the site.

My advice would be establishing a system intended built for volume.

How do we establish an address to use in Delaware so we can utilize the benefits of a series LLC?

Do you intend to manage the assisted  living yourself, do you intend to hire management, or do you intend to master lease to an established assisted living management company? 

I am trying to get some sustainable builders established in a "spec home" subdivision.

After a seasoning period, including EOY tax forms, you may be able to help establish for the seller they are not responsible,  but the main message is-this is not a strategy for a vanilla listed Jack and Jill Homeowner that needs to buy again right away deal.