As far as brokerage costs and commission splits, there is a full spectrum of compensation plans - from paying a few bucks a month in office dues and a flat fee for each transaction you close, to percentage splits on commission that range from 50/50 to 95/5.Getting your real estate license is a serious investment in your profession, and should be viewed as such.

As far as fees, I'd also look to pay a flat or monthly fee. 

The land itself is relatively flat, but undeveloped and needs to be weeded.

(check with your tax professional for this: sometimes the max deduction is a flat number... etc) You could rent out a bedroom and live for free.... 

My first 2 flat was on the same street as my condo 5 blocks away so I knew exactly what I was getting into.

However, after crunching the numbers on a potential 2nd unit, there’s a risk that my cash flow remains flat.

@David JacksonIf you started a flip, you may have expenses that you can report on your 2019 tax return in relation to the flip.Costs related to the real estate itself will need to be baked into the cost of the house(inventory).

For example an investor wants to use that property as a rental would be making a return of under 2% if they paid you $400k which they aren't going to do, even $375k puts them at 2% flat which is really bad, if rent is only $1700 you'd be getting offers from landlords under $250k. 

https://www.har.com/content/newsroom/Houston Real Estate Highlights in May:-Single-family home sales fell 20.2 percent year-over-year, with 6,671 units sold, marking the second straight month of declines fueled by the COVID-19 pandemic;-The Days on Market (DOM) figure for single-family homes grew from 54 to 58 days;-Total property sales dropped 20.7 percent, with 7,917 units sold;-Total dollar volume dove 25.9 percent to $2.23 billion;-The single-family home average price fell 7.4 percent to $298,199, the first decline since January 2018;-The single-family home median price was statistically flat at $249,000;-Single-family homes months of inventory was at a 3.5-months supply, down from 4.1 months last May and below the national inventory level of 4.1 months;-Townhome/condominium sales dropped 36.0 percent, with the average price down 2.3 percent to $206,146 and the median price up 2.9 percent to $175,000;-Single-family home rentals jumped 11.9 percent with the average rent down 2.8 percent to $1,822;-Volume of townhome/condominium leases fell 4.6 percent with the average rent down 4.6 percent to $1,586.

What you want to charge are "fees" which is money you get to keep in your pocket.Some charge an up-front "pet fee" which is a flat fee the tenant pays for the privilege of having a pet.