Yes, in theory a person can make CRAZY $$$$, and some absolutely do. 

As far as the business card is concerned, to me personally I think having both things on one business card is acceptable .  

I personally like radiators, especially steam because the heating system is simple!

Hard money lenders focus more on the property’s value rather than your personal debt to income ratio (which traditional banks use) allowing for quicker approval and funding.

Easy to use yourself too HELOC works (there may be some places that do a HELOCs on rental properties)I personally have used a 401k Loan on a few occasions - You're essentially borrowing money from your 401k and paying yourself back (interest goes back into your 401k as opposed to a bank) and if you don't pay your 401k back the loan would simply become a withdraw (maybe some tax penalties, but you could probably finagle a workaround).

Are you looking to just put the money to work or looking to be personally involved in getting, rehabbing, and dispo of deals?

@Grant Shipman Great stuff, I'm a big fan of co-living/rent by room strategy, and I do it here locally in Denver metro, and it is the best strategy in today's market for any house hacker to live for free or make money while living there, but they have to sacrifice personal space.

I’ve had a few “Gurus” personally try to recruit me into $20K+/year mentorships at networking events, along with paid workshops and masterminds.

Over the years, with personal investment alongside investments from family and friends, I’ve been able to build a small portfolio of apartment buildings with a focus on cash flow through strong operations.

For my personal portfolio I use a modified spreadsheet amortization by VERTEX, available in Google Docs.