There are multiple studies you can find online on the major markets.

In the commercial & private money world its all fair game and case by case.Use of credit cards to purchase properties to acquire/capture equity, create, cashflow, provide additional tax shield/benefits against your income, and improve your real estate investing venture is definitely one way to go about it but it should not be the sole method since there are risks like many have mentioned above.If you're using business cards (linked to your FEIN - federal employer identification number) and it doesnt report to your personal credit then it might be more prudent credit wise because your Fico scores won't tank when you max a business card out versus a personal credit card (drop of 80-100 fico pts temporarily till you payoff).So with prudent timing (funds seasoning), knowledge of how to maintain your ficos so you still qualify for your cheaper conventional money, and how to use the cards to purchase can definitely expedite your REI journey.Most people I encounter would not have the know how to do it correctly as I see plummeting fico scores, in ability to qualify, and many other issues with using cards to invest on a weekly basis.Best of luck,

You dont say what you are replacing your income with ? 

I live in California, and bought a tax lien certificate (technically a Certificate of Purchase) on vacant commercial land in Arizona, sight unseen, at an online auction.

We have quarterly and yearly meetings to discuss the investment in depth and how to improve operations thus increasing income.

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with zero or negative relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560, little to no good tradelines, lots of collections & chargeoffs, recent evictions.

Also, I think, the investment risk is more connected on the chosen project- property income, market value of the project.

I will give you some of my highlights.People in Texas complain about their property taxes at 3% ours are about 4.5%.New York in general and Monroe county specifically are very tenant friendly.Depending  on the town, the code inspectors/police can be quite anal.Since Covid and the 2020 protests we’ve seen an increase in crime in the city and therefore weakening demand in the city proper and increasing demand for the suburbs.Industry is well diversified—University of Rochester (medicine) L3Harris (defense) xerox (IT) and paychex (software/hr)) and relatively recession proof.Population growth is low and therefore appreciation (except the past 4 years) has been moderate as well.There aren’t many builders in the area so supply is relatively fixed.Home (and rent) prices are both affordable with homes typically being less than 1/3 median household income and rent being similarly affordable.For single family homes at 8% rent will cover piti with about 100$ to spare in the A areas.

If you don't have other income and want to tap into your home's equity, you should use as little as possible.

@Mikal MAxim   If your debt to income ratio including your rental income on the subject property is under 50% and you have good credit you would likely qualify for a conventional loan.