Unfortunately, such a funding option is not generally available for commercial properties, unless your LLC or Corp that is the borrower has other "unencumbered" assets that can be leveraged to generate the funds you need. 

It took them several weeks to list my property on the market when there wasn't much to be done but they charge me $600+ for cleaning.

While it requires some extra coordination, it keeps their returns clean and operational costs transparent.If the fee feels too high, consider loan servicing software with modular pricing.

I was interested in something like owning a rental property as a way to generate some additional income. 

After I fill the last vacancy, the building will generate as much cash flow in one month as its predecessor would have generated in a year.There are so many other stories whose origins are with that same knock on the door, but this one's already long enough.

I’ve spoken with a few agents who estimate it could generate anywhere from $150,000 to $300,000 in revenue, which is a big range.

Need to clean the junk out of house .. hoarder .

Your ability to identify properties and markets where you can generate equity (both imputed and appreciated) while using debt responsibly and knowing when is most appropriate to sell is how you acquire more real estate. 

That will probably be your best bet, to buy a fixer and get it cleaned up and then rent it out.Best wishes and good luck with your endeavors.  

UBIT is generated two ways.