Does this strategy utilizing HELOC really work on saving money and paying off mortgages much quicker?  

ALTA survey, utility survey, etc.$100k per building, I'd say not usually. 

If you’re looking at retrofitting to separate heating for each unit (like furnaces or mini-splits), you might be looking at a higher upfront cost, but it can shift utility expenses to tenants and improve your NOI.I’d factor in boiler age and efficiency when analyzing deals and if it’s near the end of its life, negotiate a price reduction or a credit.

Be sure to utilize tools of the trade for the best information.

Utilize tools like BiggerPockets for resources and calculators, and consider creating a simple spreadsheet to track property details, budgets, and timelines.

There are actually THREE kinds of subject to transactions1- subject to existing mortgage without lender approval2- subject to existing mortgage WITH lender approval3- subject to existing mortgage as part of a seller financed wrap around mortgage.with #1 and #3 it’s in everyone’s interest to utilize a third party servicer, who collects and then distributes payments.  

@Kyle Trotman If you purchased with a hard money loan conventional lenders will require extensive seasoning to utilize the new appraised value for cash out. 

It also identifies signer names within the documents, allowing you to uncover the owners behind the ownership entities.Currently, lenders primarily utilize the platform to monitor client and bank activity, but we're exploring options to tailor the tools for investors.

You will have to gather more accurate operating costs (vacancy loss, taxes, utilities, insurance, mgmt fees, maintenance, HOA) to best determine potential future performance.

The tenants pay all utilities including sewer and garbage.