I'm looking to purchase 10-15 new-build single family homes (250k-$300k range) as long term holds.

I personally just attend 1 to 3 auctions in my home state of SC.

I really like multifamily home purchases, but I would like to eventually try at short term rentals.

Considering I already owned the home before, I rolled over the IRA? 

Choosing single-family homes (SFH) or multifamily homes (MFH) is easier and offers stability.

pid=2107Houston Real Estate Highlights in July, 2024:-Single-family home sales rose 1.8 percent year-over-year;-Days on Market (DOM) for single-family homes went from 42 to 44 days;-Total property sales were down 2.1 percent with 8,969 units sold;-Total dollar volume increased 4.4 percent to $3.8 billion;-The single-family median price increased 2.9 percent to $350,000;-The single-family average price rose 4.7 percent to a record high of $445,440; -Single-family home months of inventory registered a 4.3-months supply, up from 3.1 months last July;-Townhome/condominium sales continued to decline, falling 19.5 percent, with the median price up 0.7 percent to $221,500 and the average price declined 0.8 percent to $261,123.

Any tips that anyone could give me would be great.

Most new home communities do not allow rentals and have pretty strict guidelines for this now in DFW. 

Not only will it have a negative effect on landlords, I would imagine some owners of single family homes will choose to sell to an owner-buyer, thus reducing the number of rental properties on the market, making it more difficult for renters to find places to rent.

We identified key areas for improvement and implemented targeted upgrades that enhanced the property's appeal.