Hi @Paul Wakim,
Everyone's goals are different, so unsure there's a "perfect" answer to your questions as to say.
If it were me, and I had the $50K, and wanted to do a lot with it in the future.. then you would need more capital, right? Having access to a lot of capital, you could thus do more flips/rentals, etc much quicker, but in the beginning go slower, learn as much as possible, etc. Walk before you run basically.
So to generate the capital at this stage, I would want to buy a run down looking place (something that needs cosmetic work is preferable to flip it quickly), fix it up, rent it out then cash out refi after 6 months. You'll then receive monthly payments (hopefully as a net positive cash flow) AND if you renovate correctly on a budget, you'll earn appreciation on the property. That cash (from appreciation) comes to you during the cash-out refi, that you can then reinvest into another few properties. Plus you'll get monthly income from rent.
From here (after you've flipped to rent a few places) you could sell (do a 1031 exchange) to get into a bigger building, more units and better cash flow OR start aggressively paying down your mortgages on these places. Within a few years you should have really good cashflow as these places are paid down.
From personal experience, I did the BRRR method for my first place, a duplex, I occupied. Bought at the right time, did a lot of renovation work (mostly myself and my father in law, who is a contractor) and 3 years later, we are selling for a large profit. Not to mention rents have covered >1/2 the mortgage while I lived there.. thus saving me more money each month.
The bottom line is (and from what you wrote).. if there's no properties available which will not appreciate quickly in the next few years, then I would say go section 8 for cash flow purposes. However if you think there are some areas that are "up and coming".. get in there now while it's cheap, do some renovations to collect top dollar, and cash in on the appreciation down the road.
Hope this helps