I will be 55 this year and have been working out with weights since I was 20 years old. I currently have all my equipment in my basement but it has taken a few years to assemble what I needed.
This is the type of leg press I have:
PowerLine Vertical Leg Press | FitnessZone
It works well and is about the cheapest you can buy. I am right at 6' and I think it would work for someone 6'3" One thing you could do as Forgeblast stated is work legs without a machine. One of the best exercises for legs is the lunge, standing one leg at a time or walking lunge. It will also get you heart to pumping.
This is one thing I am fairly knowledgeable on; fitness with weights. Don't forget to do cardio as the heart is the most important muscle you need to work.
Many times people think because they live in the rural countryside and work outside in the yard or garden that they are getting enough cardio and exercise. It is good exercise but you need at least 20 minutes of no stop cardio to get the best benefit.
Combining cardio and resistance training is the best way to get in shape, diet is also very important. Diet is a word that should not be used, I always say eating healthy; 40% protein, 30% good cards, 20 % fat at each meal. I usually eat 6 times a day spaced out from 7:00am to 9:00pm. Sometimes a meal or snack is an apple and a couple of peanut butter and whole wheat crackers (home made not pre packaged).
People at work always ask me what exercise they can do to lose weight or tone their arms, etc. They are always going on some crazy diet or something. I have got tired of telling them what to do and now just say unless you are ready to commit to a healthy lifestyle nothing I say is going to make a difference. They usually say they don't have time, but I always ask them how much time did you spend watching TV last night. The answer is usually 3-4 hours. You can set aside 30 minutes for exercise. It may extend your life or at least if you live to 85+ you may still be able to walk around and do everyday task.
I will get off the soap box now. I can offer more advise but I learned a long time ago don't offer unless asked.
