Hi @Chintan Parikh,
Right now, I'm exactly where you are. Haven't pulled the trigger just yet, so take the below info with a grain of salt.
I've done some research and have decided to start in Indianapolis (PARC Property Group) and Jacksonville (Morris Invest). They are very different business models. MI focuses on sub $50k properties. Mostly SFHs. They do not PM the properties that they sell. In fact, I'm finding out now that they don't even own the properties, Oceanpointe Investments does. They then have a local PM company take over. I'm waiting to find out if I have a choice in the matter. Oh and their one-sheet says rent is $725, but I find on Zillow rent is listed at $700 - so that's disconcerting.
PARC on the other hand is more in the $60-$180k range (focus also on SFHs). Now, they rehab AND manage the properties that they sell (I prefer this model). MI's return though is a bit higher in general, but you're taking on the risk of a C/D class neighborhood vs PARC's B/C class. And likely less appreciation (MI). Like you, I want to build cashflow enough to quit my FT job!
There are many "turn-key" companies out there, but for most of them, you are essentially paying a finder's fee and definitely paying a premium. Of course, all the work is done for you (findinf a distressed property, dealing with contractors, placing a tenant etc), so for people who have a 9-5 and live nowhere these great rental markets, it's worth it.
You mentioned Roofstock, I've only just started looking into them. I'll probably schedule a call with them soon.
Hope to hear from others who've worked with them as well.
Good luck!