As an Edwardian house it's unlikely to be listed.
Any building works are more expensive now than they used to be due to the high cost of materials, skips etc. It's also not so easy to find reliable tradespeople - especially ones who are willing to take on a job that's likely to last several weeks, if not months. Also don't underestimate the cost of clearing and replanting an overgrown garden.
Definitely pay for a full structural survey so that you know exactly what you're taking on.
Also remember that it doesn't have to be done all at once. As long as basics such as any re-wiring, re-pointing, roof repairs and heating are done, you can put in new kitchens, bathrooms etc over time.
DH & me did up our last home (a 5 bed Victorian town house with original features). But it was a mess! We only had a very small basic kitchen, it needed re-wiring throughout, the roof had been leaking & brought the ceilings down in some rooms, both ceilings and the roof needed replacing, the only heating was open fires in the main rooms. We made 2 rooms liveable (the living & dining room) we all slept in one room - DH, me, 3 DCs under 10, a cat & 2 dogs. Birthday & Christmas presents from each other & our parents were things like a new ceiling, electric cable, sockets & light switches. We didn't have a holiday for several years, went down to one car & spent many happy hours stripping wallpaper, paint, sanding etc when we got home from work.
I do feel that, in doing the work slowly as we could afford it, we had time to really think about how we wanted the house and would have regretted some of the plans that we had when we first moved in if we'd had the money to do it immediately. For example, having lived in the house we found that our original plans to extend the kitchen wouldn't have worked. So, rather than knocking through to the scullery (as we'd first planned), we kept the scullery as a utility room & downstairs toilet and built an extension onto the back with doors onto the garden. We also decided not to knock 2 downstairs rooms together to create a huge living room so that we had a good sized living room, but also a 'snug' where, as they moved into their teens, the children could take their mates, play music, watch TV whatever.
At the end of the day it was worth it all. We eventually had a house that we loved and that we felt was truly 'ours' as we'd put so much time, effort & money into.
Whatever you decide, I wish you all the best.