60 pounds in 6 months means ~2.5 lb/week — above the 1-2 lb/week "sustainable" rate, but achievable for people starting significantly overweight. Four steps.

1. Calorie deficit of 750-1,000 kcal/day

Via diet, not just exercise. Track for the first month to calibrate.

2. Protein at 1.6-2.2 g/kg

Preserves muscle during aggressive deficit.

3. Strength 3x/week + daily walking

Non-negotiable. Without it, much of the loss is muscle.

4. Sleep 7-8 hours

At this deficit level, recovery matters enormously.

Realistic expectation

Expect 8-10 lbs month 1 (water + fat), 8-10 month 2, then 6-8/month 3-6. Total: 40-60 lbs. The first month is the easiest; months 4-6 need the most discipline.