Move Toilet Flange

I am in the last two weeks of remodeling bathroom. Went to put in toilet and sink and they are way too close to each other (practically overlapping). We tried to find a pedestal sink that fits the space (22 width or less) and can't find anything we like. Another solution would be to move the toilet flange 4 inches to the right (there is about 12 inches to tub). Problem is the floor is finished (tile). I can get to the pipes from below. Exising elbow and flange is copper. How hard do you think it would be to cut existing flange, cut new hole in floor 4 inches to the right and then patch up tile. Anyone have experience with something like this before?

The center of the toilet should be at least 15" to the tub. You can put it closer, but it wouldn't be code. The lav should have had it's own 30" space too.

It would be something 30" for the tub, 30" for the toilet and 30" for the lav.
Of course older homes don't always give you this much space.

Thats the problem, its a 50 year old house. Entire bathroom is 5x7 and the sink, toilet and tub are all on the same wall. Therefore, not much room to work with, certainly not 30 inches each. But that aside, do you think this is something I could tackle? I am by no means an expert but pretty handy, I have done everything in the bathroom so far. My biggest concern is the tile but don't think that should be a problem.

I think there are two main problems. 1. You're trying to fit too much in the space you have. 2. You are trying to do this without tearing out the floor, etc.. The room is too small, but you would gain alot of space if you did away with the tub and install a shower stall. This may not be something you want, but it would gain some space. If the house is 50 years old, I'd bet there is rot in the sub floor. I think you'd be time and money ahead to pull up the old floor. This would expose the plumbing that you want to modify and you would cure any rot problems you have. I fear that to install new fixture on the old surface is asking for trouble down the road.

I already ripped out the entire floor (room was completely gutted). I sistered beams to the existing beams, put down 3/4 plywood, durarock, then tile. Unfortunately, I didn't realize the new sink would be too crowded until after the fact, hindsight is 20/20 they say. So the subfloor is fine. Showerstall is not an option because it is the only bath in our house.

Guess you touched all the bases I thought of. I gained some useable space in a couple of smallish bathrooms with pocket doors. With them, you don't have to worry about a door opening into the room. Working with small rooms can be a real challange, I wish you luck.