We first explored which option is the best for making profit in long term.

For example, we were choosing £5 stake. We chose our stake depending how much we can afford to loose. This option gave us a minimum accumulator of at least 10 for the 5 individual odds of 1.6 or over, so minimum return of £50. Similarly, for odds of 2 or over, the minimum return was £160 (minimum accumulator of 32). 

We started with £200 budget for the odds of 1.6 or over so that our stake was not more than 2.5% of our budget. We explored if this stake to budget ratio provides the required time to build a winning streak. Following 2 years of applying this betting strategy, we have broken almost even with a small profit. So, we will continue with this betting strategy. 

On the other hand, we started with £330 budget for the odds of 2 or over. In this case the stake was at 1.5% of our budget due to the higher risk with odds of 2.00 or over. Unfortunately, this betting strategy was not successful and we decided to abandon it.

Secondly, we explored if we should use the "cash out" or not.

Some people are saying that this was invented so as the bookers to pay less to a player, who would have received the maximum return if he hasn't used it. On the other hand, others argue that when the benefit is significantly higher than the risk, the cash out should be used. In our case, we did not use the cash out, but we recorded what our return would have been if we had used the cash out when we were offered more than 70% of our maximum return. In this case, the cash out was not profitable in either cases, the bets with odds 1.6 or those with 2 or over.