If you travel outside of rush hours, you'll normally be fine for seats.
Normally seat reservations come free with booking a ticket ahead of time (with the trade-off that the ticket is often less flexible).
Look into how the ALR works with sleeper trains, as that could save you a packet on hotels (plus it means that you can avoid going along the same section twice while conscious)
Personally...I'd say that I could spend the £400 better on individual tickets, especially if booked ahead. But I probably wouldn't want to spend 7 days solidly on the trains, whereas you might!
If you travel outside of rush hours, you'll normally be fine for seats.
Normally seat reservations come free with booking a ticket ahead of time (with the trade-off that the ticket is often less flexible).
Look into how the ALR works with sleeper trains, as that could save you a packet on hotels (plus it means that you can avoid going along the same section twice while conscious)
Personally...I'd say that I could spend the £400 better on individual tickets, especially if booked ahead. But I probably wouldn't want to spend 7 days solidly on the trains, whereas you might!
Railforums are a great resource on this, this thread may be of interest: https://www.railforums.co.uk/threads/gb-rail-rover-tips-advice-all-line-rover-or-regional-rovers.236862/