I am perhaps of the wrong opinion, but I am thinking: what are the chances that with my ping being below 500ms and me finding a block and then loosing the race against some other miner trying to confirm the same block. Not sure what the probability for this would be and if it is something to worry about.

I do agree that self hosting requires resources and monitoring. If I would go and spend €150/month I could also upgrade my 250mbps fibre line to 1gig and possibly improve latency.