I currently have three entire males and two entire females. As i do not wish to breed from the females at present I am going to the expense of having them both injected to prevent them coming into season, as an alternative to having them spayed, as I may wish to breed from them at some point.
In the past when I have had males/females I had paid to have either one or the other boarded for the duration of the season so as to avoid any unplanned matings.
As for vets not caring, I really don't think they would have gone to the trouble of all that training to undertake a job like theirs if they did not care about the animals.
You asked whether you should seek out another vets advice - my answer reflected the fact that another vet would probably say the same thing, and as this was a preventable occurence, did not see why it should be made more affordable. You did not ask me to give my view on your personal financial status, or personal circumstances, which I did not do.
Sorry if you think I sound patronising, but after a year of trying to give honest advice to people on this site I am starting to get a little less tolerant of people's ignorance
and whereas at first I became very upset and offended when people had a go at me for offering them the advice they were asking for, now I have become rather more thick skinned and have adopted a 'take it or leave it' attitude.