I was a Realtor for 10 years and both companies I was with had business cycle and a "wave tops" level of financial planning as part of their training. 

@Ahmed Nijimif they tried to call the police mostly they are not going to negotiate cash for keys deal & not willing to leave...once they recognize there is an attorney involved they might to.If I were you I would never make any contact with them in any way...get an attorney to handle it properly...here in Texas there are many rules have to follow when giving the 3-days notice to vacate...cant just stick it on the door and thats it...Imagine if there is a screen door my attorney told me have to stick it from inside facing the main entrance door besides all of that to make sure they receive the notice had to have it sent with certified mail & regular mail...not mentioing how careful to be about what to write in that letter any mistake could be used against you if they wanted to fight the eviction.Have done both eviction and cash for keys here all depends on the first impression I get from the former owners.Cash deal was accompanied with short term lease for the period I gave them to leave waving any rights they might have to fight the posession...all docs were notorized.Hope that helps*Not giving any legal advice here.

Have you looked at Wave?  

Vacations are the first thing to get cut from people's budgets when things get tough so you need a much bigger safety net to make it through those times and have to be willing to ride those waves to get the benefits

Either way it's important to find an attorney and get active on this so you can surf the wave rather than continue to be hit by it.In general it's been my experience most people that go through the trouble (read "time, money and back ground checks and CPE") to attain/maintain any credential or license are keen not to have it revoked due to ethics violations, acts of moral turpitude, criminal convictions, as that can have a permanent deleterious affect on their future career prospects. 

If you want a generic accounting system Quickbooks, Xero & Wave are good, but have rather large learning curves.

I'm not sure how they'd verify information like how much time you spend there, and coming from another no-income-tax state like Florida I'm not sure anybody would chase you down for the info (*waves from Tampa where I'm visiting family*).  

This arm waving is difficult to even get close to what you are looking. 

It's all about the the cost per unit in most cases.You're not the professional big wave surfer Ian Walsh from Maui, are you?

Quickbooks Online is pretty popular, but a free option is Wave Apps.