I can think of mortgage, taxes, insurance, STR insurance, water/sewer, electricity, trash, internet/cable, cleaning (can pass through), supplies, and software.

You'll like also need reserves of at least 6-12 months worth of PITI (principal, interest, taxes and insurance.) 5+ units can require more down, but 25%-35% is common.

Your sibling can either take the cash for their 30% or they could do a 1031 of their own.If you and your wife file a married joint tax return then the IRS sees you as the same taxpayer. 

If you have reserves, can you invest the money that provides a better NET return (after tax) than putting it into the down payment3.

You may find that accessing sewer comes with a high one-time tap fee plus a fee for each unit that will be served, the same for water.

A Syndicated Proactive Product Solution converts your repeatable project design cost into a investment vehicle, not only puts you in control of the whole project delivery process but also brings you repeatable product royalty fees in any projects adopted  the same product in the future, even the projects belongs to other people. check this out on Linkedin: https://www.linkedin.com/posts/karl-dixon-2b964656_ace-king-...

But you need to make money, so subtract what your fee is, and that is your offer price to seller.

My client intends to pay off the principal, interest, fees... all at the close of escrow.

The home is 1,841 square feet and was constructed in 2009.The use of the accelerated depreciation strategy helps real estate investors to reduce the tax liability immediately which therefore increases their bottom line due to the offsetting of income.

@Sejin Kim Any service that a commission broker can offer is also available for a flat fee.