Child is having a hard time with me moving to the next spot (to the chair, to the hallway, etc.)

This is not uncommon. There is usually one step in the process of slowly moving farther away from your child that your child struggles with. 

Consider what your child was experiencing before starting this process and how different this new experience may be. It makes their feelings understandable. Consider how long it was going on for If you've been struggling with being stuck in your child's bed for a long time - weeks or months - this is likely to feel very different for them. 

But different isn't bad. Different, in this case, is really good! You're helping them learn to sleep independently which is a skill that will help them thrive throughout their childhood. You are making the best choice for them even though they may not be able to understand that. 

The more confident you are and the stricter you stick to the plan, the more quickly your child will get more comfortable with this new way of sleeping. 

The more quickly you remove yourself from their process of falling asleep, the more quickly they will get comfortable with it.

This is a new experience and we should understand their feelings and even discuss it with them during the day, but nighttime is for follow through.