REI is a long game and since you own a cleaning company look for tired property owners that don't want to keep the home anymore. Some might offer owner financing with a healthy down or no down payment depending on their situation. I have yet to secure owner financing, but always trying to find it. The other consideration is that some may make it look like real estate doesn't involve money or substantial savings. If a major system like HVAC, roof, plumbing, or electrical needs repaired, then it will require substantial capital for repairs. Search out multi family properties that cash flow and could obtain owner financing (unicorn), but you may find it. Another consideration is that you may fix your credit and be able to obtain a new home, but if you don't have the income or savings to cover repairs, then it can become a nightmare.
Not trying to discourage you, but real estate has been the most stressful and most fulfilling hobby in my life. If you enjoy your job and company that you built then try to scale it and also consider moving to a higher demand area for your services or like another poster mentioned get in the trades (electrician, roof, plumber, etc.). Good luck with your journey and the first step towards your goals.