If this job popped up out of the blue, your intent was not to move within the 1st year, so you may be ok.If you are planning on building a portfolio of homes, it is safest to stick in your home for 12 months to reduce the appearance of potential fraud. 

It's not a 70% rule deal.  

Figure out ways to enforce rules to protect yourself and the other renters.

Depends on the town’s rules, though, so check that first.Renovation Loophole: Some places let you raise rents or get out of rent control if you do big renovations.

When you have studied your market properly you should be able to provide the answer of if single family or residential multifamily is better for cash flow. 1% rule was for a time when almost all deals were decent as a way to rule out the lessor deals and concentrate on the best deals.

Now I will give my opinion on buying a four plex verses building one. 

That is a great nest egg to build upon, and it diversifies your wealth.

The rule of thumb is, if you can't handle the potential call from the lender, don't do the deal. 

Build on both?

Build your database and clients.