It seems like a pretty boring and straightforward move but I'm always looking for creative alternatives!

None of the old tried and true techniques I used in the past are working any longer either, so I have to get back to the drawing board with some new creative strategies!

Alternatively, if there are certain upgrades you want in the next home, can you do it in your current residence?

When it came time for filing, my CPA told me that I would not be able to use the bonus depreciation because of the Alternative Minimum Tax (AMT).

A more "advanced" technique of using the S Corp for tax income benefits applies when you aren't dealing with passive income, i.e. rental income.Consult the professionals, but just leave it as the default in which case you will be a disregarded entity (for Federal purposes) if a single member or just taxed like a partnership if multi-member.Lastly, long term investing with a legal entity provides no tax advantage unless you are investing with a non-spousal partner, and even then you normally don't need to or want to elect another tax status.Good luck.

Alternatively, if you have a property manager, make sure they're doing this yearly to identify anything that might be missed. 

Where are you taking your courses as I have to looking for an alternative?

I do not send letters because I do exactly what Rick said and do my title due diligence before reaching out and look for the best deals and the low hanging fruit, then I skip those people using my own techniques which I posted in another post. https://www.biggerpockets.com/forums/93/topics/290841-ugly-abandoned-house---where-can-i-find-the-owner I call these people personally as these deals are golden and get probably a 50-70% closing rate by solving problems.I hope this helps.

Selling the two housing may also be an alternative if I can get my 80 k$ x 2 Back.Has someone any suggestion ?

I know there is quite some room for alternative financing and negotiation techniques but I find it to be less developped than in the USA.