For me what helped was finding ways to enjoy exercise and focusing on that. I think some of it almost was like self delusion at first, but now I legitimately enjoy my exercise routine. Treating it like some terrible tasting medicine you have to endure makes it easier to stop when you aren't in a great place. That's not to say that I don't still have days where I don't want to start, but once I get going I'm happy I did.
It's nice to have positive indicators of progress, but for some people it's difficult for that to be your sole motivation.
What funding sources do the police have that doesn't come from taxpayers? Unless it was direct donations of guns, it's still a funding source that could have offset other costs, right?