Hotels around the Tachikawa station
Some reference points:
★★★: most expensive
★★: relatively less expensive
★: least expensive
Palace Hotel Tachikawa★★★
EN: http://www.palace-t.co.jp/english/index.html
JP: http://www.palace-t.co.jp/index.html
Hotel Mets Tachikawa★★
EN: http://www.jrhotelgroup.com/en/160.html
JP: http://www.hotelmets.jp/tachikawa/
Tachikawa Grand Hotel★★
EN: http://tachikawa.khgrp.co.jp/en/
JP: http://tachikawa.khgrp.co.jp/
Tachikawa Washington Hotel★★
EN: http://en.washington-hotels.jp/
JP: http://www.tachikawa-wh.com/
Toyoko Inn Tachikawa-eki Kitaguchi★★
EN: https://www.toyoko-inn.com/eng/search/detail/00245
JP: http://www.toyoko-inn.com/hotel/00245/index.html
Business Hotel Homare★★
JP: http://hotelhomare.com/
HOTEL MYSTAYS Tachikawa★
EN: https://www.mystays.com/en-us/hotel-mystays-tachikawa-tachikawa/
JP: https://www.mystays.com/hotel-mystays-tachikawa-tachikawa/
Hotel Rex Tachikawa★
JP (You can select language): http://www.rex-tachikawa.jp/
Tachikawa Regent Hotel★
JP (You can select language): http://www.tachikawa-regent-hotel.jp/
Super Hotel Tokyo-JR Tachikawa Kitaguchi★
EN: http://www.superhoteljapan.com/en/s-hotels/tachikawakita/
JP: http://www.superhotel.co.jp/s_hotels/tachikawakita/tachikawakita.html
If you cannot find a room around the Tachikawa station, one around the Hachioji or Kokubunji station would be the next-best option. Both of the stations are located along the JR Chuo Line, and it takes about 10 minutes to the Tachikawa station by train.
For more possibilities, the following search links would be useful
English
https://www.booking.com/
https://www.hotels.com/
Japanese
Jalan
Rakuten Travel
Ikyu.com