We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

I wanted to understand if any kind of debt (conventional mortgage, HELOC, cash-out refi)  on the house will be considered as COST that I spend money on rental property and they will provide me tax saving, compare to having paid-off house, in the same degree/amount. 

You really just have to compare the ROI for each investment.

These values change based on comparable sales in each neighborhood, and therefore it’s hard to put a nationwide number on the amount you may lose by doing the rehab.Discounts create profits.

I have a question and a concern.Question - what are the comparable property values within mile radius?

Anyone has other mortgage/finance companies to recommend so I can get a few more quotes to compare?

This will be determined by normal market supply and demand - and researched through property managers, or various online tools that all seek to understand comparable units for rent in any given neighborhood.3 - there is no "right" way to calculate return on investment (roi) - it varies with the property type and your investing goals.

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

If flipping, then look at comparable sold homes that also require flood insurance.

Without knowing your rate on a HELOC, there is no way to compare the scenarios.