@Moritz Bode Hey Moritz, really glad it was helpful.
In terms of the difference between fix and flips and buy and holds - yes there are differences. The main principle for you as an investor with a fix and flip is to maximise your margin - this means you need to execute the whole process as swiftly and efficiently as possible. Your market is buyers not renters - I know they can end up being the same market but what they are looking for is very different. Buyers are far more particular and transaction shy - as a seller and this goes for any seller whether you're a flipper or whether you are selling your own home - if you want to sell your property as quickly as possible you need to pre-empt the buyer objections. Buyers can fall in love with your home but not end up buying it due to their fear of the transaction. A good Realtor will work with you on pre-empting those and will have the buyer ready to offer on your home the first time they view it, or at best the second if there's another party involved. In brief here's the guidelines I would say are paramount:
Class A Properties: these are very fixture and marketing specific and require an advanced skillset and market knowledge so if you are buying a Class A fixer upper it's a different discussion entirely - I am assuming you are not working with that property type.
Class Bs: In fixing a Class C to a B or renovating a Class B you want to work with the aspirations of the buyer - they want the Class B to look as much like a Class A as possible so my earlier point of choosing one Class A feature applies - infinity pool, paved lanai, feature wall, upmarket appliances etc. If you are tight for rehab budget choose one and make it a feature - I would always guide you towards the kitchen and the bathroom to make your feature investment stand out -you want granite in these kitchens and upmarket ovens, wine coolers etc. Update your light fittings, LEDs, hardwood in the main areas and you can use LVT in the bathrooms, utility, hallways etc. but they tend to like carpet in the bedrooms - either good quality carpet or hardwood in the bedrooms if they are upper level bedrooms definitely carpet - that transition to the soft upper is a huge selling point and sets the property apart. It's a European design signature. Definitely neutral paint with co-ordinating mouldings - white or off white, crown moulding really changes a property so go for crown moulding in the great room if you can unless it would clash with the style of the property - for example if you are going for a modern, minimalist aesthetic you don't want moulding to contrast you want the neutral tones to be uniform across the whole space.
Class Cs: the same as above applies but tone down the price tag: choose neutrals, don't waste money on up market appliances just instal new clean lookalikes - buyers in this market want the property turnkey so they don't have to renovate as long as the kitchens and bathrooms are modern and attractive they will be satisfied but you do want to choose your aspirational feature - as many as you can afford within your budget .
If you fix everything that's broken, you paint and replace outdated bathrooms and kitchens and your exterior is attractive and clean you have won half the battle. That makes it very hard for a buyer to find fault particularly if your decor is neutral. Don't leave outdated light fixtures in there - that can be a deal breaker believe me - you want the buyers transition from viewing to offering as smooth as possible. The biggest thing that sellers trip up on is removing objections - if you do all the above and then your buyer stops short of offering because they are nervous of the survey or they are short of capital they will not offer. The BEST approach by far is have the home pre-inspected and with a warranty and have your Realtor have BOTH of those ready and available on your kitchen counter at round -up at the viewing. This is by far THE best tip I can give you. If your Realtor is any good they will have fielded all objections to financing, size, location, proximity, other inventory and they will be ready when they view to pick yours. There are some truly stellar warranty programs that are not expensive and well worth the investment.
The only other thing that you REALLY need to get right when you are flipping is positioning your property price point properly in the market. This is definitely a skill and a lot of Realtors don't get this right but when you do you get an offer on the first viewing and you're out the door within 30.
Hope that helps.