I have a [very] small amount of hashing power.
What are the most important points to consider in choosing to pool or resell?
What are the comparative pros/cons of pooling vs. hash-selling (rigrentals, nicehash, etc)?
These may be the same question, but I can't seem to find any source of information. Not even the hashing services publish anything on the matter, which is weird.
What is your idea of "a [very] small amount of hashing power"?
To some people that means 10TH's and others may consider 100TH's very low. In the grand scheme of things, 1PH is pretty low.
Your answer to this question is
one of "the most important points to consider". An equally important point is how much do you pay for electricity where you live?
Is the electricity and internet stable?
Those are just a couple of the MANY questions to resolve and calculate into your mining plan.
Use one of the multiple online profitability calculators to determine if there is a way to make money or is it all a losing proposition. Some factors you just can't change.
Good luck!