I don't know the ins and outs of it all but Helen didn't marry Scott. He has zero obligations to support Helen; his only obligation is to his children. If the house she's been living in, is owned by Scott (and not Helen), then he's within his rights to ask her to move out. If the property is jointly owned, and he's currently footing the bills because Helen can't, then the house needs to be sold, if she can't buy him out. Unfortunately, this isn't any different to a normal run of the mill couple, who've separated.
Yes, she will need to find another property suitable for herself and the three children to live in. Yes, she will need to work to pay her bills. Hopefully Scott is paying Helen child support (which presumably will be substantial given he's a footballer, even if it's a lower league).
Helen is an actor, which doesn't give a person job security. Finances can be unpredictable. Actors do have to take 'normal work' to support themselves. Bills don't pay themselves, and she can't expect Scott to financially support her.