does he want to put the money away, because he thinks you guys will need it for "real" things (not saying a vow renewal isnt real.. i just mean are finances running tight for important bills, mortgage, kids, etc)? or does he not want to "share"
because he's a typical man who doesnt understnad how exciting and special a vow renewal party is to a woman?
if you guys dont NEED the money for something more important, id try to barter with him, "hey, if we can use $2500 from the lottery money that would make me incredibly happy, i think we should also throw a big super bowl party (or w/e he likes)
that would make you really happy!" --or, "you know that $2500 toward our vowrenewal would really be a great cushion and we can even treat outselves to that awesome _____ (cake, steak, top shelf bar?) you always wanted!"
i always find that if i try to make something sound like its in DHs benefit, he is much quicker to agree with me! ;)