These are one of the fastest options when they reach 99. Making mahogany tables requires 20 hours of work while costing between 200 and 200 mils as each table is made from 6 mahogany planks.
If you don't want to pay that much for building a table to 99, You can see below alternative methods to get there however keep in mind that they aren't going to be as quick as this method.
It is a different method for achieving 99 Construction that we can recommend. You can make progress in creating Teak Benches which is a very click intensive method since nearly simultaneously you can create one bench and destroy other.
It is twice as expensive as Mahogany Tables and time to level is as fast. If you're not against methods that make you constantly clicking - this one might offer a variety in your learning.
If you don't want to spend over 200mil getting to maximum Construction we have some good news for you. It is possible to reach 99 in this ability while paying less than 100 million. However, it's still an amazing amount , there aren't many more suitable alternatives to this now. If you'd like to go by this method, then start similar to the above guide and stop at 47.
If you want to know more about RSorder, you can go to https://www.rsorder.com/old-school-rs-account