べっそうがあります There are Japanese hostels.
べっそうがたくさんあります There are many Japanese hotels.
べっそうもあります There are also Japanese hotels.
べっそうもたくさんあります There are also many Japanese hotels.
When you say 〜があります、〜 part should come Noun. Not adjective, not adverb.
べっそう is Noun.