My concerns are genuine in that I think flipping is a great way to upgrade Americas dilapidated housing stock and make money.

The links on his website to his newsletter archives are all dead, nor does the "Note Store" link work.

You can't add value to your crypto.You probably don't even know what your 401k is invested into (or, if you even SUPPORT the companies you're investing in.)You can't add value to your Apple stock or Meta stock.But you CAN buy a great property, fix it up, solve the problems, and INCREASE the value (and cash flow.)

Dead body discovered after 4 days of decomposing2.

I have a full time job that pays around 170k excluding stock options (which I would like to retain as a separate investment for now but I am open to use that for real estate if required).

and the low purchase prices often mask major deferred maintenance that can be a surprise - the midwest housing stock is much older than CA, AZ, NV, etc.i'd encourage you to save up for a house hack locally and then house hack while you continue to learn and savegood luck

We recently came to the US, and have around 150k of cash on HYSA and some stocks, that I believe smarter to not sell to have different type of assets for diversification. 

As long as your credit is good you, if your HELOC rates go up, you should be able to rinse/repeat that "0% balance transfer" option every couple years until the debt is paid off.There are alternatives out there as wellLoan on your 401k or IRALoan on your stock accountDown payment assistance programs that provide all or some of the downpayment money.

I won't beat a dead horse here but make sure you have a solid contract, some kind of project management communication that is on a weekly basis with photo and or video documentation of progress.

Maybe stock the house with homemade cookies for the officers too.