From what I’ve heard, 25%-30% of profits is a safe estimate depending on your tax bracket.

To invest in Section 8 housing, look at areas such as Cleveland, Columbus, Cincinnati, and Dayton, choose safe neighborhoods, study Section 8 standards, analyze property types, and explore financing choices.

Would it be safe to purchase a new fridge, deduct maybe 1/2 of cost to replace  current fridge door from the security deposit, provide receipt with explanation?

Quote from @An Lan: I am not a professional real estate investor, I just invest in houses as a safe asset and do not choose to rent them out.

He announces his live presence at his home office right where boats can drive by on the water, and it's not safe.

Examples could include:Partnering with other investors to share risk.Using seller financing or lease options.Leveraging creative rehab techniques to save on costs.Negotiating with contractors in a unique way to reduce expenses.I’d love to hear any stories, tips, or approaches that helped you pull off a deal others might have instantly passed on.

April is a safe month to "play the market" if you will, because the market starts picking up as a whole then but, a good reliable tenant to me always seems better than making a few hundred more a month.

Class C transitioning to Class B: more renovated homes, higher income tenants and homeowners moving in, nice cafes, shops, restaurants, coffee shops opening up.An extreme example of Class C to B is in San Francisco - when I was a kid, what was not a safe neighborhood and had lower income people, is now in high demand and tech workers making $200,000+ are living there and people walking around at night going to restaurants and shop. 

I'm not sure if we can like to articles on our own websites here, so to be safe I'll just suggest the IRS web page, which does do a pretty good job of explaining the basics: https://www.irs.gov/taxtopics/tc510The main thing to know if you're going to claim business miles is that you do need to keep a log of every business trip. 

Use a 2nd position heloc to absorb your paycheck, once your paycheck is entirely paying off your heloc, then it is safe to advance $3000 or $5000 extra against your heloc to make a principle payment against your 1st position heloc.