Good morning. We are in a cycle of lots of new builders on forum. I'd like to address a few things that I've learned building a couple of 7's and helping numerous other builders. I like to use the term, "Work smarter, not harder."
Keep in mind these following things are what I've learned and worked for me. They were learned from personal experience and builders before me. They may be different for others. I'm hoping others will chime in and give their tips for saving time and money.
A common theme for most is not having enough time to devote to the project. As a result, wise time management is crucial. Here we go
1) Attempt to do building research when away from the project. i.e., Research while on breaks at work. Do specific research to the component you are involved with at the time. This way your time use is focused when you are able to get back to the garage or hangar.
2) Although entertaining and fun to dream, forget all aspects of panel planning until you are about 6 months from buttoning things up. Having built one flying 7 and having another 3/4ths of the way, I learned that nothing is gained from doing this too early. About the only thing that really won't change is the auto pilot so decide on that and so the servos can get mounted. Things change so quickly it is a lost effort that will require redoing later.
It is quite entertaining to see someone post, "here's my panel idea, please comment." Then in the signature block. "Himey Kablutz, Grinderswitch, Wy. Tail kit in progress." Well unless you are a miracle worker, you are at least a year out from needing anything remotely close to a panel.
3) For some unknown reason there is trend for builders to accelerate, "getting it on the gear." This is truly the most artificial symbol of progress that will hinder your build progress. And, to get the engine mounted. As with the panel, this does nothing to help your build time. In fact, it will greatly hamper access to "inside the cabin," work.
I fully realize that doing this is motivator for some and if you really feel the need, do it. Just realize this will slow down the build. Maybe mount it, feel good and remove it so you can get real work done
I also understand that this may vary some from model to model but you get the concept.
I highly recommend getting everything possible done BEFORE even thinking about mounting the engine and getting it on the gear. I use low saw horses. This way you have easy access to getting all inside the cabin work done. Also, you can easily get the wings fitted and all systems completed and the wings removed and put way. The canopy is easy to work on when the fuselage is sitting low and easily accessible.
At this point is when you can start to finalize your panel. Once you do, mount everything possible while you have easy access.
On the first 7 I followed this advise and completed everything including the panel and canopy (tip up). The forward skin was fit but not riveted. The wings and all systems were completed. THEN, I mounted the engine mount and completed several thing on the firewall before putting it on the gear.
With it on the gear, but without the engine, I completed the wheel/tire and brake mounting. Much easier than whacking your head on the engine
Finally when everything possible was completed unrelated to the engine, the engine was mounted. This is really a non-event that only takes a short time.
4) Now with the engine mounted, complete everything that needs to be done, "where you have no choice or limited choice where it goes." This will prevent do-overs later. I have serious experience at do-overs on a couple of items.
In summary, these are few of my learning experiences gleaned from the wisdom of others and from my experience. Hopefully many others will contribute. I'd love to learn more from others to assist in saving time on the new 7.
Good luck!!!