(Prior to graduating college and getting a full time job, I was an incredibly social person, so this was a huge change of mindset to sacrifice the way I did).And on the other end, my brother decided to start his own business while I was working and did not work hard as he spent money like crazy and eventually went bankrupt (filed 1 year ago) .

If by partnership you mean a legal partnership (LLC or LP or otherwise), then that legal entity would need to either dissolve (or deed out your 50% to you) prior to sale before you could sell your own 50%. 

As long as you sell it while you have still lived in it for two out of the 5 years prior to selling it you can still take the $500K tax free. 

Any damage to the wallpaper, paint, walls, floors, carpeting, doors, windows, window treatments, light fixtures, appliances, or other improvements to the Property (to include burst water pipes due to freezing caused by neglect or carelessness of the Tenant, his family, or any of his guests), in excess of ordinary wear and tear, shall be promptly repaired or replaced by tenant, at Tenant’s sole expense, so as to restore the Property to the same condition as existed prior to the commencement of the Term.

I’ve heard from some lenders that I need more equity, others said there was a “cooling period” required after purchase to be able to use additional gained equity in land (from rezoning), and others needed prior experience.

I also had to have an office inspection prior to obtaining the authority to pull credit reports.  

Mainly because I have to pass inspection from the accrediting body prior to staring the business in the front portion of the building approx 3000 sqft.

I have a tenant been in a house 26 years , I lived in it the prior 10 years .

If you turned over the keys prior to lease signing, the ship has sailed. 

Almost all of them are newbie who took a course with no prior experience.