Maybe... You should find a local person who could of helped you before you left living creatures that depend on you before you left for five weeks... Five weeks can be a lifetime for someone!
Maybe...not everyone wants to let someone who they just met have full access to their house for 5 weeks...
When your on vacation, 99% of the time the fish will be better off if you don't have anyone take care of them. Most of the time if someone has an issue, its because of the person they had watch their tank. There is plenty of evidence of this if you search the forum...
And most healthy fish can easily go 5 weeks, as long as the tank is setup correctly. They can go a long time without eating.