I use BF Bot Manager v2 (I have no affiliation whatsoever) which you can buy outright. They have an add-on which you you have to pay a monthly subscription which is a multiple strategies bot so you could basically have unlimited strategies with that one I suppose (I've only tried the free trial).

Their bots work great, as long as you have a good strategy as Shaun says. I used to think the bots were rubbish but of course it was just my strategies that were rubbish (and there were a heck of a lot of them that were no good over the years).

They are for Betfair so can't do your arbitrage stuff though.

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Never give up on a dream just because of the time it will take to accomplish it. The time will pass anyway.”

― Earl Nightingale