It is definitely not advisable to eat the entire (proverbial) elephant in one go! Not only will the overall cost look hefty, the likelihood of a successful implementation also reduces when implementing the complete IIoT solution in one go. You will likely find many avenues in your business to implement a smaller solution for a very specific problem statement and then gradually expand the scope and coverage. This transition will help keep the costs under control, and you can invest more as the management starts seeing the benefits. For example, you can start with setting up sensors to detect changes in temperature (heat), vibration and other parameters to monitor the health of one of your equipment. You may start seeing benefits in terms of reduced maintenance cost reduced equipment downtime. Post this you can include additional equipment, production lines, etc. In the long run IIoT is definitely a good investment.