What is the best case residual value of the leasehold interest?

Like taking the profits from your residuals and parlaying them to other investment avenues.

:"The landlord must send a notice, to the place the tenant is expected to receive it, that (1) describes the property in sufficient detail for the tenant to identify it, (2) advises him that he has 10 days (15 days if the notice is mailed) to claim it, (3) appraises him of reasonable storage costs, and (4) tells him where to claim the property.The notice must also inform him that unclaimed property of value will be sold at a public sale and property believed to be worth less than $500 will be kept, sold, or destroyed.After deductions for storage, advertising, and the sale, landlords must turn over to the county any residual proceeds."

@Makenzi Capezza You can also double check you don't have glue residue on the wall by using a heat gun (or blowdryer to warm the location up) in a spot or two and checking to see if that's what's making the weird texture.

They would usually provide their own not pretty stuff (plumbing pipe/fittings, mortar and grout, adhesives and screws, etc.).

Some of the old mortar is crumbling and there are spots with moisture residue (photos attached below). 

I want to definitely start off close to California because I plan on moving back once I have the residual income to afford to live where I want to live.

In 1968, a Minnesota based company was trying to invent a new type of adhesive and did, although they initially believed it to be somewhat worthless.

He sent me links on quality of concrete and adhesives to alleviate my concerns about adding to already poured concrete. 

They refused to fix their toilet and said they had their own system of stopping the toilet from running--which we suspect has to do with twisting the valve with their hands).My brother-in-law is a handyman and came immediately to help since residual water was still flowing into our unit.