Not young any more but work in Clerkenwell/Farringdon and I cycle in daily from Forest Gate which is just out past the Olympic Park. It’s definitely cheaper living out East (we moved after years living in Camden in order to buy a house) and my ride in is very pleasant. Through the Olympic Park, over a footbridge on the A12, through Victoria Park, then a “quietway” route most of the rest of the way. There is also the option of picking up the canal for a lot of it. Not sure if it makes any difference but Loughborough University have a campus in Hackney Wick so would have that available too.
Forest Gate will be a Crossrail stop too but obviously that will now be too late arriving for him. But we do already have the new trains running to Liverpool Street via Stratford which only takes 11mins. Stratford is very well connected too for getting elsewhere.
Farringdon is the main area for architects in London. With so many clustered together I would have thought there’s a good chance of there being some kind of meetup group for young architects which might be worth trying to find to get advice.