Guessing others will chime in that have stayed in the area…. I would consider south of Milwaukee a little… Google Lodging in Oak Creek. Right east of I-94 there are a bunch of options on College Avenue. It is pretty easy access to Southshore landing or McKinley in Milwaukee.
When are you looking to go?
You could also check out the”strip”,meaning the ma and pa motels on South 27th Street(Hwy 241) in Franklin/Oak Creek.These are as reasonable as you can find in the area.A few are seedy(Motel Skyway),most are decent.Dolly’s Villa Vista(Oak Creek side,south of Rawson Ave) was very accommodating when I was there.
But beware,most of these places do not have a website,and are run as first come,first serve.So if the vacancy sign is on,you are good to go.