If my husband broke 3 vertebrae and has a scar on his face, how should we calculate pain and suffering?

My husband fell through the floor of a home that his aunt rents from a local business owner. The aunt had reported to her landlord that the floor was sagging and he refused to fix it, but agreed to furnish some supplies. My husband thought only the plywood was soft, but a rotted joist broke, dropping him and some floor around him about 8 feet to the dirt basement below. He landed on some cinder blocks, fracturing 3 vertebrae and leaving a scar on his face near his temple. He was on medical leave from heart surgery, but was due to return to work 5 weeks before the doctor is now saying he will be released. We are trying not to hire an attorney as we would rather settle small and quick, but not ridiculously small either. I am growing increasingly frustrated as both the homeowner and the insurance company have not showed any concern for my husband, who, a month after his fall is still in pain every day and night. Any words of wisdom?