To estimate closing costs and monthly expenses for a multifamily property, closing costs in New York typically range from 3-6% of the purchase price.

For the typical wholesale the steps are really just fine a deal through marketing, have them sign a wholesale contract, have an established buyers list and send it to them, get a buyer to sign an assignment of contract agreement, and when you close you get paid out your fee from the title company.

The $450K will be returned to me as payback of my loan to the intermediary, without trigger any capital gain taxes, right?

The loan amount will typically be determined by appraisal (LTV - loan to value ratio) - but your qualification will also be based on other metrics like you mentioned - DSCR ratio, FICO and some other factors. 

It’s always smart to do your homework and make sure the provider’s model aligns with what you’re looking for.As for fees, management companies typically charge 8-10% of the monthly rent.

There is no given answer here, because the whole property needs to be relatively consistent.Kitchens and baths are the common answer, but if they are passable and you choose to invest in them anyways at the expense of peeling paint (or off putting exterior color) and overgrown landscaping, the appraiser and tenant will be walking up with a bad taste in their mouth, thereby not valuing the interior work you have done.But think about the general flow of someone looking to rent: more bedrooms will typically dictate more rent.  

My educational background is in science, but my personal background is rooted in the Midwest where I grew up on a farm and gained a skillset in everything mechanical. 

Mortgage interest deductions are typically claimed by the partnership on its tax return and passed to partners via K-1 forms.

We sold a $330k rental property with almost no base so we need to do an 1031 exchange of roughly $300k to offset capital gain.

Quote from @Rajagopalarao Paidi: Is there anyway to minimize or avoid agent costs, I don't have much scope for profit if I pay agent costs, what options typically one has Do it FSBO if you want to save them and then hire a TC or company to do the work...