If the property is not vacant, how do i go about removing the current occupant within the law as soon as possible?

To include pest control, lawn care, garbage removal, unit cleaning (tenant turnover), unit painting (tenant turnover), HVAC inspection and servicing, to name a few.  

You would have to dig at them to be destructive on purpose to remove them.   

Let them know unauthorized trespassers are currently in your home and you want them removed.

Get organized and remove the idiots that got elected from office. 

Unfortunately most of the questions you asked aren't areas where advice can be given being so removed from the situation. 

I have also heard members discuss putting certain rehab dollars that are expensed on line 19 of schedule E with detailed supporting schedules so your mortgage broker or bank have an audit trail to possibly remove them from DTI calculations.  

I would also add removing old,broken,warn out,or enormous furniture that is clearly unattractive and makes the living room and bedrooms appear smaller and less comfortable than they really are.The house should be staged with modern and appropriate furniture to show buyers what they're new furniture will look like in their new home.Excess clothing that is not normally worn should removed from overstuffed closets and dressers and donated to charity,thrown away,or boxed up and stored off site from the home.If your toilets are old or have unremovable stains that look terrible,replace the entire toilet.Bathtubs should be reglazed to look shiny and new again.

Make sure you are prepared and have a roommate removal agreement set so if something between them doesn't work out they can agree with your approval to let one off the lease and can then add another. but income wise I'd have them get new roommate approved before you let old one off.

You have EPA issues with removing the siding and will need abatement which is costly $$$$$.