Assistwith Money Management on direct bets on Slot/Roulette 4 numbers

[jrhelp007]

I started to play on an American Slot Roulette machines (RNG) that are very popular in Atlantic City and Pennsylvania.

I bet on 4 direct numbers on the machine that allows to place bets up to 99 units on each number. I play the 25 cents although you can go up to $10 per number.

After the conditions are met, I select 4 numbers for betting.  One of the 4 numbers that I select usually hits within 24 spins. However there are times where the selected numbers are part of numbers that can go cold for a long period time. So when I reach the end of the 24 spins it will impact my bankroll. It will basically wipe out my winning and in time will “bite” my Bankroll.

Here is my Money management. In the past I had a Stop/Loss set but I found later that the numbers were hit reaching the the 12 or 14 spin and my stop/loss was too short.

Here is my Bet strategy straight up 4 numbers:

3 Virtual spins.  I found out that on the 4th spin it may hit the number. About 44% of the time.

Bet Straight up 4 numbers:
3 Virtual spins.
1 unit for 8 bets on each number for a total of 4 numbers.
2 units for 3 bets.
3 units for 3 bets.
4 units for 2 bets.
5 units for 2 bets.
6 units for 1 bets.
7 units for 1 bet.
8 units for 1 bet.

To the expert of Money management of the board, please advise in term of improving my process. Thank you.

John