LOLThe LOL is because you've never known a system that doesn't misuse SSN's in that way.In the UK banks and insurance companies never ask for and don't know a customers SSN equivalent (national insurance number)...... neither is it necessary for a credit check.

also how could it be made legal, if possible somehow, to  include in a month to month written lease, that reduction of income by 50% or greater and/or loss of income for more than 2 weeks must be communicated to owner in writing and either such event understood as the equivalent to a 30-60 days advance notice of moving out (to hopefully a cheaper apartment for their new lower income situation)?

All move-in fees are paid in cash or equivalent prior to occupancy. 

You may also want to consider income equivalents, such as food stamps, rent subsidies, and utility subsidies as "income" for the purposes of qualifying.

IMHO you should sign the lease, collect first month's rent and security deposit (in cash or equivalent) and hand over the keys all at once. 

Digging them up and replacing them entirely is the only way to overcome that.What you are asking for is the equivalent of telling your roofer that the roof hasn't leaked for 60 years, so why can't he just tar patch it!  

Round up (or the equivalent) and regular yard maintenance is about the only thing that's going to work. 

As a result you may be finding yourself not only paying higher dues for services not equivalent, but you may find yourself with fees similar to a moving target...in other words, your dues will increase over time and still not provide the services needed to ensure the property is properly maintained giving you a good value. so if you start out negative cashflow, it will deepen with each raise in fees.

We too charge the equivalent of two months rent (but don't phrase it that way).You don't need to have it in the lease.  

I just bought a 60watt equivalent GE reveal LEd lightbulb for $5 at Home Depot.