I'd be willing to take book on within 60 days you will either be missing a lock box or in court trying to get rent from a tenant who 'deposited' in the lockbox. 

. review the current market paying close attention to DOM.. if it looks like you can rent it within 4 months you will break even. if you want to keep the tenant propose a multi year lease with incremental increases until you reach the desired lease rate.Most start ups fail within the first year.Next time you rent review the financials before you lease to get a better quality tenantIn the mean time pursue the former tenant for the back rent plus court costs.I have a friend who makes more money from former tenants than he's ever made renting his commercial property.

You will want to be able to have written proof if ever taken to court.

Under what circumstances would an evictions court side with the tenant?

If you do accept payment from bf, it could be seen by courts as granting him tenancy..

If legal proceedings are brought by Buyer against Seller to recover the Earnest Money Deposit, the Due Diligence Fee and/or the reasonable costs actually incurred by Buyer in connection with Buyer's Due Diligence, the prevailing party in the proceeding shall be entitled to recover from the non-prevailing party reasonable attorney fees and court costs incurred in connection with the proceeding.

If I'm reading the notice correctly, it is ordering that the friend, her heirs, and "parties unknown" (who it appears are some people interested in potential ownership of the property) appear in court to "do what is necessary" to protect their interests.I did a drive-by to check out the property.

Need more detail as there was court case classifying the solar equipment as personal property, not real property2) You might be able to get Business Energy CreditMight be worth talking to Tax professional because credit can give you significant tax saving as credit decreases your tax dollar for dollar.

Note however, that if you improve an apparently abandoned property and the legal owner, or an heir to the legal owner subsequently shows up to claim it, the courts will generally not enforce reimbursement for the improvements you made to property you did not own. 

Only the IRS (or the tax court in the event of a dispute) knows for sure...