That way you can find investments to provide a decent return and to compliment your full-time work. 

I've been doing some research and came across a company called WholesaleShelfCorporations.com that specializes in providing aged entities.Before making a decision, I would like to hear from those who have actual experience with it.

Open escrow with homeowner, end-buyer, and self; self transfers contract to purchase to end-buyer in Title/Escrow, and provides T/E with end-buyer's contract with self: agreement to purchase, and fee instructions for self ($10k + difference if any) to be paid out of closing escrow5.

I will be reaching out to those providers.

But if you just want an idea of rents for a limited number of units, the free version may work for you.Does it also provide historical data?

They can provide ideas of how to do things cheaper, re-use materials where appropriate, etc.Proper planning and foresight of a project.

If you provide a scope of what you are demo-ing, you may have better luck with someone's experience to comment here, but costs can vary regionally, so a local contractor would give you the best actual estimate. 

There are several turnkey providers in town who can handle the process for you from top to bottom but you will give up some of the equity for the ease/reduced risk of the transaction.

Providing funds outside of a transaction that would effect the LTV given by an insured lender could lead to mortgage fraud, money laundering and wire fraud as funds are disbursed.

You are obligated to provide the oldest verifiable operating statement (base year), which is adjusted into today's dollars (Using an LA City formula for inflation) and this is compared to your current year (yes with receipts, cancelled checks, bank statements, k1's etc), which can be significant.