Best way to get started

[Karac Davis]

38 years old. Changing careers. Free now to start a new adventure. Have 100k in liquid capital. 
I ultimately want to buy and hold properties for rent. I would like a 20-50 unit empire. I of course want the dream of passive income and simply taking care of my properties etc. 

Should I get into contracting with a flipper or custoM home builder for 50k a year 1099 and start my own llc and be a “real estate professional” and learn the ins and outs while making less money at first,  or take a sales job 9-5 that makes 150k a year w2 and build up capital first. 

I think my interest is in being my own boss immediately but I’m concerned about not generating enough capital soon enough to really get this going. 

I do have one rental now that costs me about $1260 a month, yet generates $1615 a month. Totally updated right now. Plan on keeping it.