Repair or replace roof?

[Curtis Moe]

Hi Friends,

My rental's roof is leaking above the carport.  

I have received bids on just repairing the low slope area where the leak is, and bids on the whole roof.

Some of the contractors said the granule content on my shingles was still pretty good and I should get at least 5 more good years out of it.

Question is do I pay ~$850-1000 for the repair, then replace the whole thing in 5-8 years for ~$5,000-6,000?

OR

Do I have the whole thing replaced right now for ~$5,000-5,500?

Thanks for your feedback.

- Curt