That is the decent (and courteous) thing to do, so that others won't spend time to write an answer, and so that others who search out an existing topic can see that answer. 

The investors I know finding properties on the MLS are making 30+ offers a week, embarassing offers, in hopes of finding 1 or 2 properties a month.Others are door knocking, cold calling, spending money on mailers to find off market properties.  

Hence why WB said index fund, sure if ya got a few hundred mill - billion+ yeah, could you imagine trying to sort out deploying a billion dollars into real estate, yikes, what a headache. 

Having been front and center in the late 80s of a billion dollar syndication company ( was an independent contractor in charge of finding and entitling their land projects in northern CA.)

More difficult after spending money on a rehab, but it might be worth an appointment with an attorney.  

I have gotten two very good clients that way.. this way I dont spend a dime on marketing they come to me :)

Apply for a dimensional variance on the vacant lot to allow a smaller lot and/or setback so it can be built upon.Your best first steps are to sketch a plan, possibly with an engineer's help, then contact the zoning department to discuss your idea with them to get informal feedback on your liklihood of success before you spend a lot of money.

To the nuts and bolt question of what defines occupancy, it is the place you reside and spend the majority of your time/nights.

As long as you're not in a rush, we always recommend spending some time asking questions of DSCR lenders you might be looking at.

I'd use an approved underlayment.Pro Tip: If it's cheap, it's not good.....at least spend in the moderate range.