My advice would be this:
If you have $150k in cash that you would like to leverage into out of state turnkey investments, that can be a truly lucrative strategy, one many many of our clients employ (most of our clients aren't from AL). However, you should set your sights a little higher, on properties that are more likely to have stable tenants, in areas where there is some appreciation potential, and where you may, eventually, be able to sell to an owner occupant instead of another investor.
Investing in B/B+ class properties will put you in neighborhoods where nurses, teachers, skilled laborers, and other stable middle-class folks live. Places with good schools and easy access to job centers, places where people who can't afford (or just don't want) to own yet are still willing to settle down for a bit until they can. These people have more stable income, don't need government assistance to pay rent (Section 8 vouchers seem like free government money to investors but there are pleeenty of strings attached), and are more likely to stay longer if you keep your property maintained (or have a good PM). Your monthly cash flow may be lower than the paper figures for lower class props, but your vacancy, maintenance, and turnover costs will also be lower, not to mention fewer evictions. Consistent, reliable, moderate income is better than volatility in rental investments, especially if you're going to finance your purchases.
So how far can your cash go? Using Birmingham figures as an examples (since that's what I know), B/B+ turnkey props go for $85-125k. Let's take our average price of $100k. 25% for down payments is $25k. So $150k could cover 6 downpayments on MUCH more stable investments. Average cashflow is $250-350 (let's go with $300), so $1800 per month after all expenses and PITI. Keep it as income or plow back into paying down your loans faster (it's all tenant-paid anyway) to save on interest.
The point is, you have better options with $150k than properties that are almost definitely in C-class areas or below and are 'managed' by people you will never have a chance to vet. While it's not always necessary to go see every single property you buy, it IS HIGHLY RECOMMENDED that you go visit any provider you consider working with before your first investment. Tour the city, see their properties, meet team. After that, if your first property is a success, building your portfolio with that provider in that market is easy. BUT since these investments are all over the map, that puts you in a slightly more difficult position, vetting-wise.
Plus, it sounds a bit like they are encouraging you to purchase without viewing. I'd say you should ask about flying out to visit (even if you don't intend to) and see what the reaction is. Say you want to see properties before buying, or at least just see SOME properties of theirs to view the workmanship and neighborhoods, and see if the response is 'come on out!' or ' well we don't do tours' or, always a classic, they just stop responding.