Taxonomy terms with numeric names and views filtering within range
I believe a numeric range can be filtered using regular expression.

The following regex can effectively filter values within the range 10500 - 11000 (both ends inclusive)

(10[5-8][0-9]{2}|109[0-8][0-9]|1099[0-9]|11000)


Here is a sample view that works as expected with the above regular expression



You can create any numeric range as a regex using this generator http://gamon.webfactional.com/regexnumericrangegenerator/

Alternativelly what you can do is to add an extra numeric field to populate with term name (as a number) and than using that field to filter the view OR create a more complex function using hook_views_query_alter as you mentioned