Client recruitment for msp

Currently starting to transition my division from inhouse(1 corp just inside) msp to providing services to multiple smaller clients and trying to expand the whole shtick.

Recomendations of an existing client has helped us landing few extra clients, but i’m looking for a word of wisdom on any other effective way of attracting new clients for such services.

I don’t consider fb ads and such to be the way to go as starting out budget for such things is limited and they can also turn into money thrown in the recycle bin if the ad doesn’t do well.

I hope someone have been in simmiliar situation and can provide their insight on this.

Cheers and Happy new year!