Is it possible to compare what the brokers I have consulted with offer.Or is that unethical and I should stick to the first one who send me his details also for the sake of not affecting my credit score. 

Once you’ve got the hang of that you can easily repeat the process or go bigger.

I do completely disagree with you on Covid affecting C and D but not A and B.

The BRRRR strategy could be perfect for you—it’s a smart way to buy, rehab, rent, refinance, and repeat, allowing you to grow your capital while accumulating more properties.

You only need base hits repeated over time in order to become wealthy.

At that point my current HELOC will be free to be used on the next property and I will rinse and repeat, so "yes" this is a financing variation of BRRR.

Since we are using equity money, are we stuck only buying one every few years until the HELOC can be paid off, rinse and repeat?  

I ended up owning about 250 of these.. and having to sell them off taking loss's virtually everyone of them it was a blood bath for us HML in 08 to 2010.. and not anything I want to ever repeat.. those that started lending HM post 2011 have had the rising tide great market situation but even with the good market people fail all the time for various reasons. 

Our cost is affected by topography of the lot and we're building a small one bedroom. 

I have a lot of repeat clients that I know the ins and outs of their finances, I know their strategy, I know their markets, and it helps me tailor the loans to their goals.