It wouldn't work on it's own as accommodation for two or three Abi.
Any housing needs to be seen as a whole picture so the total amount of full time all weather space. That wendy house is only 4x3 so imagine the floor space of that as a hutch - just too small. You need to consider how much of a run will be attached and if it's all weather too. If it was, then you might get away with a trio using that as their sleeping area. If cost is an issue, you would be better buying a shed of 6x4 and adding a run to that. If you don't want a 'shed' you could cut down the sides and make it lower and put in some 'windows' for not much money. That would be cheaper than buying a wendy house that would offer the right amount of space for a trio.