That's a tricky one to answer Sandra as it greatly depends on your personal physical wellbeing.  Assuming an electric pump isn't suitable for your needs and it's a choice between this Double Action Pump and the Coleman Bellows Pump, more leg strength is required for the Bellows whereas the Double Action uses your feet to stabilise the pump at the base, while your arms and back do most of the work. Generally it shouldn't be too difficult with either pump but once you are nearing full inflation, you will feel a resistance.  

G'day Ray,

You won't be able to use the Manual 6.5L Double Action Pump for bike tyres, they're a different style of pump, with different attachments. You can generally use this style pump for air mattresses, and some pool toys.

G'day Chris,

The Manual 6.5L Double Action Pump has a few different size adaptors, and one of them is the correct size for all the Coleman Airbeds so yes it will do the trick!

G'day Peter,

I've given this a whirl with our display models and using the Coleman Manual 6.5L Double Action Pump it took me about 8 minutes to fully inflate the All Terrain Queen Double High Airbed. It took about 480 pumps. You could probably take 30-60 seconds off of the time as I did pause for a moment to help a customer out with a query. 

G'day Imran,

The Coleman Manual 6.5L Double Action Pump is 23L x 11.5W x 39.5H cm, so it's going to be a lot smaller than the other pumps you were looking at.