From the Detroit Airport, Merriman Road runs north to cross Highway US 12-Michigan Ave in Inkster.....so the Detroit Airport area hotels (other than the Westin) might be convenient, if your relative feels that driving south on Merriman Road is not too far. Most Detroit Airport hotels are along Merriman Road, north of Highway I-94 and north of the Airport, such as the Marriott and Courtyard, Hilton, Crowne Plaza, etc.

In Inkster, there are a variety of small motels which are not part of a national chain, so it may be best for your relative to see them in person to see if they are acceptable. These local small hotel/motels are along US12-Michigan Ave, for example:
Aplpine Hotel at 26131 Michigan Av
Avon Motel, 28505 Michigan Av
Budget Inn, 26040 Michigan Av
Evergreen Motel, 28473 Michigan Av

A full list is at the City of Inkster Business list web site:

http://www.cityofinkster.com/Busines...y-Business.htm

Hope this is helpful!