Hey everyone.When buying a 4-plex, or any investment property for that matter, what is the best way to “own” it for tax advantages/purposes? 

Not mine :)And a SFH has one mortgage, one water bill and one tax payment.

I am a US Citizen, I pay US taxes but earn Foreign Income.

Since you are a pro, use the calculators provided under tools to help but here is my quick rundown on a post-it:Buy = $80kRehab = $30kHML Points = $3kHML Interest = $3k (assuming 90 days held total)Holding Costs = $1,500 (assuming 90 days electric, gas, water/trash/sewer, builders risk ins, prop tax)*Selling Costs = $10k (6% relator fees, 1.5% closing costs)Sale Price = $135kProfit = $7,500*I am taking a very high level guess on your holding costsFor me this is WAY too thin of a margin.

They are asking $820k, and this property brings in an NOI of 71K/year after all expenses, vacancies, taxes, and all. 

If I build an ADU will my property taxes go up.My mother is disabled and needs a structure that is convenient for her. 

I believe I'm running my numbers correctly, but would love some input.Purchase price: $99,000.00ARV: $150,000.00Improvements: $2,000.00 (home is rent ready, but needs fridge, dishwasher, and a cleaning)Closing cost: $5,000.00Mortgage: $531.00Property tax: $320Insurance: $85Vacancy: 5%Maintenance & repairs: 5%Cap ex: 5% (I'd generally do 10%, but this is a townhome)PM: 0%HOA: $300Potential rent: $1500-$1600Potential monthly cash flow: $40Cash-on-cash return: 9.5%Total Equity: $50,000.00Here's the deal.

There is a promissory note, and a Deed of Trust for the transaction, and if you look up the property in county tax records, she is the owner and his name isn't reflected anywhere.She owes a minimal amount on this home, and if a tornado or fire takes it down, she understands she is not covered, and theory still owes him for the balance, even though he also understands he'll never see that money.What would you do? 

Real estate is taxed completely different than an active business, especially if the real estate you are buying is rental properties.

This tax is meant to protect tax-paying businesses from unfair competition from tax-exempt entities.The use of debt-financing creates exposure to taxation known as UDFI on the percentage of the income the IRA receives from the non-IRA (borrowed) capital.