Not reasonable. If I could have only one gun, I'd have no problem spending the price of a decent used car (or more) to get whatever I thought was perfect.
That's why there are so many European guns with price tags equal to a house. If the law severely limits what you can have, it only makes sense to buy the best, price be damned.
Well, if a price limit is not reasonable, then as others have said, maybe state the actual situation/need for it.
Expensive can be great, but if it's an "end of the world" situation, are you going to want an expensive, tight tolerance weapon, or a much cheaper, but durable, function through everything type weapon?