I'll be in Reading as well! Small world. What's the commute back and forth into London like? My husband seems to think it will be terrible, but I don't think it sounds too bad. My commute to work here is 45 min to 1 hour 15 minutes depending on traffic, and there I wouldn't be driving so I could read or whatever.
We plan on moving into London when our lease is up, as that's where most of our friends have ended up. So I really wanted to avoid the temp job in Reading for 6 months and then having to job hunt again when we moved to London. Moving into London when one of us would be out of work would be a bear as well...
Good luck with temp job hunting in Reading. At least in my field, there isn't a lot so I had to do retail for a while. Which wasn't bad for six months.
Personally, I don't think the commute is bad cause I'm used to driving 40 min to my nearest grocery store in the USA. I did the trip between Reading and London every day for like two years. For me, the TOTAL time it took from home to where I was in London was an hour including walking everywhere. And I definitely took the time to read. I got through like 40 books one year- a personal record!
Pro-tip: get the month commuter ticket from National Rail. It's about £500 up front for the month, but it covers your commuting into and out of London at peak times as well as the Tube. It's really worth it when one round trip ticket is £50 (or £33.50 with a 16-25 railcard) daily, and you get to skip the ticket purchasing queues.
And I agree. It's super expensive in London if only one person's working. We chose Reading cause it was directly between my uni and my husband's uni. Now, he has a job in Reading for the next two years so we're a bit attached to the place. XD Living in London would be nice for me and my job prospects but a pain for him.
Edit: The actual train travel time between Reading and London Paddington is about 30 min on a direct commuter train. There are a few that will take longer which stop at other towns between. Reading to London Waterloo is about an hour if not longer.