Or can you insert an agreement addendum that states what your doing?

If it's not tile, your looking at pulling up the subfloor, installing Durock or another comparable material...pulling off baseboard heat covers and such.Going to need to demo drywall at walls to insert proper backing for full height tile. 

He's not bullying anyone (like I have seen many do inserting their opinions as to what MUST work or not).

Also, my contract doesn't state the location of closing (lesson learned) but it does say "emd will be held at 'insert my closing attorneys office name here'".

Often times value add sponsors will refinance after a few short years once they finished the renovations of the property, inserted new property management that know how to value engineer the financial operations to increase the NOI.  

You follow up with "Sounds like if we can get this closed before (insert the reason) we could really hep you out a lot couldn't we?"

Why not insert in contract 5 days or 7 after binding for emd?

However I do have properties very similar to <insert property here> that I can show you".

Try to insert your value and strengths into whatever theyre lacking.

You should seek legal advice from a local lawyer.Personally, if I were in your shoes, I would insert something like the following language in a conspicuous place to the offer:  "This offer is contingent on the current tenant's vacating the property no later than [INSERT DATE].