Hi ^^
Well, it depends on how much money you want to spent and what style of gameplay you prefer. Generelly I don't recommend sniping for total airsoft newbies, because often it's much less "action" and dynamic than the "normal" kind of gameplay i.e. with an full auto assault rifle.
First of all, your husband should know what type of role fits best for him, the firepower vs. mobility argue is a big deal here. For example: You like the more dynamic gameplay with lots of "fast stalking" or a more fireteam involved role of a sniper, you'll need some specific kind of ghillie suit that allows you fast moving and still average concealment in standing or kneeling positions, and you'll need more firepower.
A higher magazin capazity aswell as a higher rate of fire is generally necesarry, in cost of less accuarcy. An semiautomatic sniper rifle, such as a gas operatated WE M16 would be a good option in this kind of "P.O.U." (Philosophy of use). Now this is an example for an offense load out and style of gameplay.
If he likes stealthy styles, is patient enough and wants to take the very best advantage in terms of range, accuracy and concealment, a boltaction sniper rifle such as a gas operated Tanaka M24/M40/M700/AICS would be a good choice, or even better an upgraded spring operated Tokyo Marui VSR-10. It all has it's pros and cons.

Speaking from experience, I recommend to beginners to start with an assault rifle, or an SMG first. When starting with a ghillie suit and sniping, you can't rely on your firepower only. You have to rely on your camouflage and your greater range than then normal player. That's what makes Sniping so hard in airsoft. If the enemy sees you, you have to retreat because usually you don't have enough firepower. You're operating alone or with a spotter - against a bunch of enemy players with AEG's and 500 BB magazine you wouldn't have a chance if you're to close and get spotted.

There are lots of controversy topics and things in this kind of role in airsoft. I'm also working on a youtube video project to share my experience with other players. Perhaps this might be interresting for you or your husband. I didn't have the time to work on the project the last weeks though - shame on me. But there is just so much to talk about, I can't put it in one message every time

My chanel Page on youtube: [link]

Hope I could help
Cheers ^^

--
Let no-one walk alone, committing no sin and with few wishes, like elephants in the forest.