My three questions then would be:
What do you need?
What do you have to spend?
What level of ball do you hope to be calling 3-5 years from now?
Believe, me, a lot of us have been in the spot you are, myself included. It's not that we don't know money's tight; it's just for most the experience of having to go out and replace already expensive equipment in only a year or two is not cost effective, and the time that you take that one shot that good protection could have saved you from makes the few extra bucks worth it.
In many businesses, umpiring definitely being one, a piece of advice I hear often is "dress one step above your station" or something to that effect. Next year you say you'll be working JV/JH BB. Do you aspire to Varsity? College? Some guys don't and that's fine. But if you do, every little thing can count especially if you live in an area where there's pretty stiff competition for high quality games.
I know where you're coming from on clearing the spending; I've got a wife too. Just lay out the facts; I'm sure she wants you to be as safe as you can be back there. If nothing else, the equipment is tax deductible (more money in the tax refund!) and could lead to better games quicker (more money in the game checks!) It helped for me.:confused: