It's a smart move to buy a duplex, triplex or fourplex and make one unit your principal residence - this way you only need a minimum down payment.  

My grandparents own (2) properties, their primary residence (paid off) and a rental property on the same street (has a bank loan with substantial equity). 

Just pointing out things from the experienced parent end of the deal (having been you a long time ago...) 

Bulk Sales provision should be in every single NJ contract where the owner is engaged in business and not selling in the regular course of business or a primary residence.

Home price increases are sharpest in these markets, while dwindling housing inventory in the lower price classes could be discouraging people from buying.”Here are the basic stats on single-family home sales for February 2018 for the City of Austin and the greater Austin area:About the local economy, Mark Sprague, state director of information capital for Independence Title, said, "While wages and jobs in the Austin area haven’t increased, the local economy remains strong and continues to attract new residents and potential homebuyers.

As @David Chwaszczewski said there's a big difference in mileage/rate for primary resident vs investors.

Send the resident tennat and their handler a rent increase notice according to your state regulations.

How about parents?

The exact conditions required for a residence to be habitable vary by state, but often include an operable heating source during cold weather. 

I could sell one of my properties (condo) use, that money for flips in Atlanta within the next 1-2 years build up additional funds to acquire an apartment complex, and to grow my portfolio, but I want to hear from some experienced investors and what they would do if they were in a similar position.Current Picture/Portfolio: Property 1: Condo (Atlanta, GA 30328)Current Rent = $1550/MonthUtility Reimbursement = $200-300/MonthHOA $383 (In line with HOA's for other communities) Purchased June 05th, 2015 and resided in property until Jan 22nd, 2017 (Total of 1.64 Years)Lease Started Jan 23rd 2017 and Lease Ends on June 30th 2018.Current Equity 135,000 (Purchase Price)  - 85,000 = $50,000Current Comps Similar Properties are selling for $155,000 to $170,000Current Mortgage Terms: 15 yr Fixed 3.325% Monthly payment of $996 (Includes Insurance and Property Taxes)Anticipated Total Earnings if Sold at End of July $64,500 (Sell Price $155K) to $78,500 (Sell Price $170K)  Property 2:Town-home (Peachtree Corners, GA 30092)Current Rent = $2000-4000/Month (AirBnB) 60-70% Occupancy since November of 2017Purchased July 28th 2017 and currently residing in basement house-hacking with my younger brother.HOA $325/Month Covers, Water, Lawn Maintenance, Sewage, Security GateCurrent Equity 336,000 (Purchase Price) - 265,000 (Remaining Loan Balance) = $71,000Current Comps Similar Properties are selling for $345,000 to $360,000 due to private/public school ratings going up shortly after purchase.Current Mortgage Terms: 30 yr Fixed 4.326% Monthly payment of $1823 (Includes Insurance,PMI, and Property Taxes.)