Bill,
I'm in a similar spot to you, just turned 29. I'm a nurse, grossed 150k this last year, house hacked a duplex in California (doesn't cash flow, but mortgage 600$ after rental income). I find myself putting in 60+ hours a week (and I love my job), so my time was more limited. My first year (85k income) working I bought my duplex. 2nd year (150k income), I bought a SFR in Kansas City, and a duplex in Ohio. I pretty much peaked last year income-wise.
I still have student loans, so I save about 2500$/month.
I also think 50k+ savings might be a little ambitious, I saved 30k+ last year and live relatively frugal. I'm not saying you shouldn't shoot for the stars, but to curb your expectations a little bit based on us having similar situations.
Some expenses you might not have included:
When I got my duplex, I put in an AC, fixed plumbing, washer/dryer, fridge, window blinds, etc. Not sure what you already have, but the basic necessities of living costs more than I expected to get my home up and running.