Here are the corrections for the passage:
1. great, excellent,
(Not necessary, the word "great" is acceptable in this context)
2. a, an,
(Line 3, "a on-site" should be "an on-site")
3. availably, available,
(Line 4, "everything availably" should be "everything available")
4. distracted, distracted from being,
(Not necessary, "distracted from" is acceptable in this context)
Alternative: "distracted by"
5. subsidised, subsidized,
(Line 2 and 6, "subsidised" is a correct British spelling, but "subsidized" is the American spelling)
6. everyone's, everybody's,
(Line 7, "everyone's" is correct, but "everybody's" is also acceptable)
7. therefore, however,
(Line 7, "therefore" seems out of place, "however" would be a better choice)
8. which, who,
(Line 8, "those which" should be "those who")
9. entire, entirely,
(Line 10, "entire fair" should be "entirely fair")
10. wanted, wanting,
(Line 11, "a company wanted" should be "a company wanting")
Corrected list:
Word, Correction, Word, Correction
Line 3, Line 3, a, an
Line 4, Line 4, availably, available
Line 2, Line 6, subsidised, subsidized
Line 7, Line 7, therefore, however
Line 8, Line 8, which, who
Line 10, Line 10, entire, entirely
Line 11, Line 11, wanted, wanting