I suspect it will be easy to do if:

- you don't do rounds frequently (rounds cost money, which means it's harder/costlier to run Ark if you do rounds frequently, and unless you're very generous you have to pass on those costs to your users as fees, which makes it annoying to use)

- your friends and family trust you to prevent doublespends (if they *don't* trust you, they have to settle each payment before considering it "received," and settling costs the operator money, which, again, means more fees for users)

Ark's big tradeoff seems to be this: costs rise if you do rounds often, and if you don't do rounds often, it has the same trust assumptions as a statechain -- i.e. the operator can doublespend payments